The Mayor of Greater Manchester - backed by some Labour rebels as a potential replacement for the under-fire PM - said he would be 'unflinching' in speaking out for the much-delayed legislation.

Speculation is building around Andy Burnham as pressure on Sir Keir rises following the departure of former Deputy Prime Minister Angela Rayner and US ambassador Lord Mandelson.

Intervention on future inquiry cover-ups comes as backing grows among Labour MPs for Manchester Mayor to mount leadership campaign

The Mayor of Greater Manchester - backed by some Labour rebels as a potential replacement for the under-fire PM - said he would be 'unflinching' in speaking out for the…