British Prime Minister Keir Starmer vowed to lead his party into the next general election and rejected suggestions he was failing to listen to the concerns of his party on Wednesday, as he faces a growing rebellion from lawmakers over welfare reform.

All of a sudden, this is a grave crisis for Sir Keir Starmer, perhaps the gravest of his year in Downing Street so far.Politically, it looks very hard for the government to proceed with its flagship welfare policies.

More than 100 Labour MPs have indicated they are prepared to defeat the government over its plans to slash billions of pounds from the benefits system. Here, Sky News takes a look at why the welfare bill is the biggest test of Sir Keir Starmer's premiership so far.