Jeremy Corbyn has filled four vacancies in his shadow cabinet following the Brexit vote.
The Labour leader appointed Rebecca Long-Bailey as shadow business secretary, Sue Hayman as shadow environment secretary, Christina Rees as shadow Wales secretary and Peter Dowd as shadow chief secretary to the Treasury
In total, 52 Labour MPs rebelled against Mr Corbyn's orders and voted against triggering Article 50 on Wednesday night.
Jeremy Corbyn will make decisions on whether to sack frontbenchers who defied the whip in the next few days, a Labour source said.
The Labour leader will also decide who will replace the resigned shadow cabinet ministers, the source added.
A total of 52 Labour MPs rebelled against Mr Corbyn's orders and voted against triggering Article 50.
Labour leader Jeremy Corbyn insisted that he has support from MPs on all other campaign issues and upcoming votes.
A total of 52 Labour MP's rebelled against their party leader's three-line whip for a second time to vote against Government's Brexit Bill.
Labour has called on the Government to set out its plans for immigration in post-Brexit UK.