When Florence Nightingale took over the army hospital at Scutari, the first thing she put in front of the War Office was a daily order for 25 gallons of beef tea. If you are over 60 you may still remember the taste. A cup of it brought up the stairs on a tray when you were poorly, dark brown and clear, with the smell of a Sunday roast in it. Your grandmother called it beef tea. Your mother, who had less time, called it Bovril. The real thing was simple and took hours. A pound of lean beef from the shin, cut small, put in a jar with a pint of cold water and a pinch of salt, and stood in a pan of simmering water for most of a day until the meat had given up everything it had. Strained, and brought to the bed in a cup. That cup is 200 years old. It is in Mrs Beeton, with 12 different recipes. It is in every hospital diet sheet of the Victorian age: on admission, a patient got bread, 2 pints of milk and a pint of beef tea. Children got half a pint. It is in Jane Austen and in What Katy Did. When General Lee lay dying in Virginia his wife sent out for a piece of beef to make it. Nightingale herself had a sharp word for it. Boil it down, she said, and there is barely a teaspoon of solid food in half a pint. And yet, she went on, there is something reparative in it that we do not understand, and it can be given safely in almost any illness. She was describing what the chemists found a century later. The thing that comes out of shin beef in a slow pot is gelatine, the broken-down protein of the sinew and bone, with the amino acids the gut and the immune system are built from. It is the first thing a body short of appetite can use. That is why it was on every ward. Not because it was fashionable, but because the people nursing the sick had watched it work for 100 years. The cup went when the ward kitchens closed. The drinks trolley carries a carton now, and a hospital in 2026 can serve a recovering patient a sandwich in a plastic triangle without a trace of the animal anywhere on it. If you were ever handed that cup by someone who loved you, you were given the oldest medicine in Britain. It has not stopped working. We just stopped making it.

What people think bacon is doing to them, against what bacon is actually made of. The fear: - Nitrates, cancer - Saturated fat, clogged arteries - Processed, the same shelf as cigarettes - Pig, so it must be seed oil - Salt, blood pressure - A guilty treat, Saturday only The rasher: - Pork, salt, smoke - A few milligrams of nitrite, mostly gone by the time it's fried - About 40% saturated and 50% monounsaturated fat - Thiamine at levels no other meat reaches - B12, B6, niacin, selenium, zinc - Complete protein, 15g from two rashers - The one food on earth that makes the whole house come downstairs The cancer story runs nitrite, then nitrosamines, then your bowel. Your mouth makes more nitrite out of a spinach salad than a rasher carries, and the nitrosamines were a 1970s problem, fixed by curing with vitamin C, which has been in the bacon since 1978. The cure stays because it keeps botulism out. The "nitrate-free" pack next to it is cured with celery, which is nitrate with a vegetable on the label. The group 1 figure, for anyone who reads past the headline, is about one extra case in a hundred for eating it every day of your life. The polyunsaturated share moves with the trough: a tenth in a barley-fed British pig, nearer a fifth in a corn-and-soy American one. That's the case for the farm shop. It was never a case for the cereal. The thing that smells like Sunday was never the problem. The oil you were told to fry it in was.

"Drinking milk is unnatural" is an argument made by people holding an oat latte, and it deserves a proper look. The objection is that milk was made to feed a baby cow. Correct. Now apply it to the rest of the trolley. A grain of wheat is the food supply packed for a baby wheat plant. You grind it up and call it toast. A nut is the same arrangement for a baby tree. A bean is the same for a baby bean. An egg was made for a baby chicken. Honey was made for baby bees. Almost everything you eat was put there for somebody else's offspring. Milk is simply the one that admits it. The second objection is that no other animal drinks the milk of another species. Cats do. Hedgehogs do. Dogs would, given a minute alone with the jug. Blue tits learned to open British milk bottles for the cream and taught each other the trick across the whole country. Seagulls in California have been filmed stealing milk directly from nursing elephant seals. No animal turns it down on principle. They only lack a bucket and a stool. No other animal ferments a soybean, sets it with gypsum and presses it into a block either. Nobody calls tofu a crime against nature. No other animal soaks oats in enzymes, adds rapeseed oil and a phosphate to stop it splitting, and sells it in a carton with a joke on the side. Milk comes out of a cow, who made it from grass, in a field. It is ready when it arrives. One of these drinks needed a factory, a chemist and a marketing department. The other one is being accused of being unnatural.

They attacked lard. We got Crisco, cottonseed oil hardened with hydrogen, made from what the cotton gin threw away. They attacked butter. We got margarine, out of the same vats as the soap, with the vitamins added back by law so it would pass for food. They attacked dripping. We got chips fried in oil that breaks down into aldehydes, the compounds a laboratory buys to damage a cell on purpose. They attacked whole milk. We got the skimmed, with the vitamins poured off in the cream and sold back to us separately. They attacked the egg yolk. We got egg whites in a carton, with the choline, the vitamin D and every fat-soluble nutrient left in the bin. They attacked sugar. We got aspartame, which keeps the craving running on an empty stomach and now carries a possible cancer grade from the WHO. They attacked breast milk. We got formula built on vegetable oil, mixed with whatever water the mother had, and a generation of babies in the poorest countries died of it. They attacked the stockpot. We got a cube of salt and palm fat with no bone, no marrow and no gelatine in it. They attacked wool. We got polyester, which is oil, which keeps the sweat in, and which melted into the skin of sailors on HMS Sheffield. They attacked leather. We got polyurethane shoes that crack in one winter and sit in landfill for 500. Now they are attacking beef. We are getting pea protein with eighteen ingredients, a cartoon cow on the box, and a third of the iron. The original came from a field and a kitchen. The replacement came from a refinery and a patent. Not one of the originals has ever been improved on. Every one of them has been replaced.

In the early 1980s doctors in Cambridge laid premature babies on lambswool, and the babies grew faster. They were the smallest patients in the hospital. 34 infants, born weighing about two and a half pounds, lying in incubators. The standard bedding was a cotton sheet. A psychologist and a paediatrician had heard that mothers in Australia and New Zealand put newborns to sleep on lambskins, and that the babies seemed more settled. So they ran a proper trial. Half the babies were nursed on cotton. Half were nursed on a pad of lambswool. Nothing else was changed. The result went into the Lancet in 1983. The babies on wool put on 22.7 grams a day. The babies on cotton put on 18.6. That is nearly a quarter more growth, in children for whom every gram is a step away from danger, from changing what they lay on. Nobody was entirely sure why. Wool holds a layer of still, warm air against the skin. It takes up moisture without feeling damp. It gives under a body where a sheet does not. Hospitals had known a version of this for a long time. For decades a patient who was bedbound was put on a sheepskin to stop the skin breaking down, and trials in Australia later confirmed that real sheepskin prevents bedsores. Then came the synthetic version. A sheet of polyester pile that could be boiled and cost a fraction as much. It looked the part. It does not do the job. A ewe grows the best thing ever found for a newborn to lie on, and a lamb is born onto it. The hospital tested that against the alternative and wool won. The alternative was cheaper, so that is what most babies get.

Jacques Pépin cooked for the President of France at 22, turned down the Kennedy White House, and has spent 65 years telling Americans there is nothing on earth better than good bread and good butter. He was born in 1935 near Lyon. His mother ran a small restaurant and he was working in it before he was 10. He left school at 13 to be an apprentice. By his early twenties he was personal chef to Charles de Gaulle. In 1959 he sailed for New York with almost no English. Within 2 years he was offered the job of chef to President Kennedy. He said no. He had already cooked for a head of state, and he went to work for a chain of roadside restaurants instead, because he wanted to understand how America ate. In 1974 he hit a deer on a country road. He broke his back, his pelvis and both arms, and the doctors doubted he would walk. He could never again stand at a restaurant stove for 14 hours. So he started to teach. That is how most of America met him. On public television, a small Frenchman with fast hands, boning a chicken in under a minute and finishing the sauce with a lump of butter. In 1999 he made a series with Julia Child, and the two of them argued on air about who was using more of it. Through 40 years of low fat advice he never changed a recipe. Asked for his last meal, he has always given the same answer. Bread and butter. He turned 90 last December. The two people who taught America to cook stood side by side at a stove, and neither of them ever reached for the margarine.

For fifty years Britain treated a poorly child with Lucozade, a bottle of glucose handed over at the exact moment the child's white blood cells needed to be at their quickest. If you were ill in the 1960s or 70s you remember it. The heavy glass, the crackle of the yellow cellophane, the fizz going flat on the bedside table by teatime. It came from the chemist, which made it medicine, and "Lucozade aids recovery" stayed on the label until 1983. Visitors carried it onto hospital wards the way they now carry grapes. It held so much sugar that NHS clinics poured it as the dose for the diabetes test, right up until 2017, when the recipe was halved to dodge the sugar tax. Give a healthy adult 100g of sugar and the white cells that swallow bacteria slow down, and five hours later they are still slow. It happens with glucose. It happens with honey. It happens with orange juice. Lucozade, honey and lemon, a glass of orange for the cold. The whole British sickbed is on that list. The World Health Organization now tells surgeons to keep the sugar down in the blood of every adult on the operating table, diabetic or not, because a high reading lets infection into the wound. Milk was built for the opposite job. A calf is born with almost no antibodies of its own. Every one it fights its first weeks with arrives in its mother's milk, and raw milk goes on carrying the kit: - Antibodies, aimed at whatever is going round the farm - Lactoferrin, which locks away the iron bacteria feed on - Lysozyme, which splits their walls open - White blood cells, still alive When about a thousand babies were followed through their first year across five European countries, the ones given raw farm milk had fewer colds, fewer ear infections and fewer fevers than the ones given long-life milk from the shop. Heating the farm milk at home took much of that away. Britain fought a child's infection with a bottle that slows the white blood cells down, and pasteurised the drink that comes with its own.

American law still defines ground beef as up to 30% fat. That figure was never a warning. It was simply a description of what came out of the grinder. A butcher breaks down a carcass into steaks and joints. What is left over is the trim: the ends, the flank, the pieces between the ribs, with the fat still on them. Put that through a mincer as it comes and you get something very close to 70 parts lean to 30 parts fat. Nobody designed it. That is what a cow is. So for most of the last century there was one kind. You asked for a pound of mince, or a pound of hamburger, and he ground it in front of you. It went into the pan with nothing added, because it brought its own fat. What ran out went into the gravy, or into a cup by the stove. Then fat became the enemy, and the labels appeared. Lean. Extra lean. 5%. To make those, somebody has to stand at the block and cut the fat away before grinding. You are then charged more per pound for the work of removing a third of the food. And think about what was removed. The fat is where the flavour is, where the vitamins are carried, and where most of the energy is. Take it out and you have a pan of dry crumbs that will not brown, so you pour in a spoonful of seed oil to get it started. The customer pays extra to have the beef fat taken out, then pays again to put rapeseed fat in. Your grandmother's mince was 30% fat because nobody had thought of a reason to interfere with it.

The woman who taught America to cook was 6ft 2, used butter by the pound on public television for 40 years, and outlived most of the people who told her to stop. Julia Child was born in California in 1912. She could not cook until she was 36. Then her husband was posted to Paris, she ate a sole fried in butter in Rouen, and that was that. If you were in America in the 1960s, you remember her. Black and white, a voice like a trombone, dropping things and carrying on. She put a whole chicken on the board, rubbed it with butter, and told you to do the same. Cream went into the sauce. The fat stayed on the roast. Then the 1980s arrived and the country was ordered onto margarine, skimmed milk and chicken breast with the skin off. Cookery writers fell into line overnight. Julia would not. She said the fear of food was doing more harm than the food. She carried on with the butter, in front of the cameras, while the nutritionists wrote to the network. She was mocked for it as a relic. She worked into her 80s, lived on her own, and died in 2004, 2 days short of her 92nd birthday. The people who built the low fat pyramid have been quietly taking it apart ever since. This January the American government finally turned it upside down. She did not live to see herself proved right. She just went on cooking as if it had never been in doubt.

The Royal Navy switched its sailors from cotton to polyester two years before the Falklands, and the sea put the two fabrics to the test on the afternoon of 4 May 1982. HMS Sheffield was hit by an Exocet 70 miles off the islands. The warhead did not go off. It did not need to: the rocket fuel did, and the ship filled with fire and black smoke in seconds. Twenty men died. Many more came out of her with burns, and the burns had a feature the surgeons at Ajax Bay and the Uganda had not been trained for. The shirts had melted. The new working rig was polyester, lighter and cheaper and quicker to dry than the old cotton, and in a flash fire it did what polyester does at 250 degrees, which is turn to liquid and bond to whatever it is touching. Men were brought off with their uniform fused into their skin, and the first job in the burns tent was peeling plastic out of flesh. Nylon socks did the same thing to feet. Anti-flash hoods and gloves, the white cotton gear every sailor still wears at action stations, had saved the faces and hands they covered and left a line where the plastic began. The lesson was learned at the Sir Galahad too, at Bluff Cove a month later, where the Welsh Guards were caught below decks and the burns ward at Ajax Bay found the same thing. Afterwards the Navy went back to natural fibres. Cotton action working dress, cotton socks, the wool jumper that had never left. The US Navy took the same lesson from the Falklands and again from the USS Stark in 1987 and banned polyester and Corfam shoes aboard ship. Then, in 2012, it issued a new blue camouflage working uniform, tested it, and had to announce to its own sailors that it would burn robustly and melt into a sticky molten material. The uniform was nylon and cotton. It had been in service for four years. Every navy that has ever had a fire has arrived at the same answer and then forgotten it as soon as the accountants came back. Natural fibre does not melt. A sheep's wool will not catch at a temperature a ship fire reaches, and when it chars it stops. Cotton burns, but it burns off, it does not become part of you. The shirt that went into a man's skin on the Sheffield is the same fabric as the school polo shirt, the fleece, the gym top, the sofa cover and the sheet on the bed. The Navy had to be shown it once. You are wearing it now.

A British girl in 1960 left school able to roast a joint, render the dripping, make a suet crust and bone a fish. Her granddaughter was taught to design the box a pizza comes in. It was called domestic science, and it was on the timetable from the 1870s. Once a week you carried your ingredients in on the bus in a wicker basket with a tea towel over the top. A woman in a white overall, who frightened everybody, taught you the lot. - How to choose a cheap cut and make it tender - How to make stock from the bones - How to use up the cold joint on Monday - How to feed a family of 5 for a week on a wage The boys were next door doing woodwork, and went home to be fed by someone who had passed the course. In 1990 the National Curriculum abolished it. Cooking was folded into a new subject called design and technology, alongside plastics and electronics. Pupils no longer cooked a meal. They "developed a food product". They surveyed their classmates on preferred toppings, drew the packaging, and wrote an evaluation. Thousands of school kitchens were stripped out, since nobody needed an oven to draw a box. That was 36 years ago. The first children through it are now the parents, standing in a supermarket with no idea what to do with a shoulder of lamb, and being told that their weight is a failure of willpower. It was a decision. A country that had taught every girl to turn a carcass into a week of dinners chose to teach her children to be customers.

Wool, from the day it was half the wealth of England to the day it cost more to cut off than it was worth. 1297: Parliament tells the king that wool is half the value of the whole land. The Crown's wars run on it for 200 years. 1337: The Lord Chancellor is sat on a sack of it, so that nobody in the room forgets where the money comes from. 1571: Every man and boy over 6 is ordered by law to wear a wool cap on Sundays. Fine for a bare head: a day's wages. 1666: Every corpse in England is to be buried in a wool shroud, on pain of a £5 fine. The dead are conscripted to keep the price up. 1721: Printed cotton is banned outright. It threatens the wool. 1815: Yorkshire mills dress every army in Europe. Both sides at Waterloo are wearing West Riding cloth. 1916: The British Army takes the entire wool clip of Australia and New Zealand for the duration. Wool is a munition. 1941: Two chemists in a lab in Accrington invent polyester. Nobody notices. 1951: The Korean War. Wool hits a pound a pound in Australia and farmers buy aeroplanes. The peak. It will never be seen again. 1960: Acrylic jumpers in the shops at half the price. The housewife does the sum. 1979: A mill in Massachusetts makes a fleece out of plastic bottles and the outdoor industry stops needing a sheep. 1991: Australia's wool stockpile collapses under 4.7 million unsold bales. It takes 10 years to give it away. 2002: Polyester overtakes cotton as the most produced fibre on earth. Wool is under 2% and falling. 2020: British farmers are paid under 30p a kilo for the clip. Shearing costs about £1.50 a sheep. Fleeces are burned, buried and composted across the country because the cheque would not cover the postage. 2021: A Cumbrian farmer posts his annual wool payment. It is £1.50. For the flock. 2023: A television presenter with 78 ewes learns on camera that his fleeces are worth less than the men who took them off, and 5 million people find out with him. 2026: A sheep is listed as an emissions source on degraded upland, and the fleece on her back is the only fibre in the shop that will not burn, will not shed plastic, will not melt onto a child, and will rot when you are done with it. Seven hundred years at the top, 70 years to the skip. The sheep did not change. The fibre did not change. We found something cheaper that comes out of a well, and we are about to find out what it costs.