Andy Burnham must overhaul Shabana Mahmood’s migration reforms or risk overstretching social care and fuelling far-right sentiment, the TUC general secretary, Paul Nowak, has warned.

Speaking ahead of the TUC’s annual congress in Brighton next week, Nowak welcomed the “sense of optimism” around Burnham’s fledgling government, but he urged the PM to act in a series of areas, including migration and the cost of living.