Reform UK looks set to make inroads into Labour’s leave-voting heartland seats after Sir Keir Starmer’s honeymoon period ended early, a new opinion poll has suggested. Nigel Farage’s party is currently poised to pose a major threat to Labour in dozens of seats after the Prime Minister’s support suffered a major dip just eight weeks after romping to victory. The latest BMG opinion poll put Labour’s support at just 30 per cent, down from 34 per cent on July 4. The leaderless Tories would regain a number of seats from Labour and the Liberal Democrats after witnessing a two-point boost to take the…