ALT Customer information poster for London Euston, dated September 2026, with a yellow background highlighting a major rail disruption. The poster advises that on Sunday 20 September, the railway between London Euston and Watford will be closed until 4pm for emergency bridge work. During the closure, Avanti West Coast, London Northwestern Railway and Lumo services will not operate to or from Euston, and customers are advised to avoid travel and check National Rail for updates. A note explains that urgent safety work is being carried out to remove a footbridge. The poster also states that London Overground Lioness line services will operate at a reduced frequency of two trains per hour between Euston and Willesden Junction, while London Underground Bakerloo line services will continue to operate normally. An illustration shows a large construction crane lifting a sign describing the urgent safety work.