Labour MPs are expected to announce a challenge to Jeremy Corbyn’s leadership after a motion of no confidence in him was supported by three-quarters of the parliamentary party. Two possible candidates are the party’s deputy leader Tom Watson and ex-shadow business secretary Angela Eagle.
But Mr Corbyn has said he would not “betray” his supporters by resigning.
He is expected to receive a warmer reception at a rally of his supporters on Wednesday.
The SNP, meanwhile, is to ask the Speaker to declare it the official opposition at Westminster, claiming their Westminster leader Angus Robertson has more support than Mr Corbyn.
