By Andrew MacAskill, Elizabeth Piper and Alistair Smout LONDON (Reuters) -British Prime Minister Keir Starmer won a vote on his welfare plans on Tuesday at significant political cost as he suffered the biggest parliamentary rebellion of his premiership and was forced to back down on key parts of the package.

Sir Keir Starmer's controversial welfare bill has passed its first hurdle in the Commons despite a sizeable rebellion from his MPs.

Sir Keir Starmer’s concessions will likely be enough to win the vote, but the prime minister still faces a major rebellion on Tuesday