Exclusive with @Smyth_Chris   Rachel Reeves will announce further welfare cuts after the Office for Budget Responsibility told ministers their benefit reforms will save £1.6billion less than planned   The OBR rejected ministers' £5billion welfare savings estimate, putting it at £3.4billion   Reeves will announce that Universal Credit incapacity benefits for new claimants, which were halved in Kendall's original package, will now be frozen until 2030 as well rather than rising in line with inflation There will also be a small reduction in the basic rate of UC in 2029 The moves will raise an extra £500milloon   Govt source says that the new cuts are in keeping with green paper thetimes.com/article/f80da8c…