Greater Manchester Mayor Andy Burnham has announced that he is seeking permission to run in the Gorton and Denton by-election. It follows months of speculation about whether he was eyeing a return to parliament, to potentially challenge Sir Keir Starmer for leadership of the Labour party. But first he has to get past Labour's National Executive Committee. Warning, there is flash photography in this report. #AndyBurnham #KeirStarmer #GortonandDenton #UKPolitics #Channel4News