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.
Liberal Democrat leader Tim Farron has vowed the party's peers will aim to amend the Brexit Bill during its next stage going through the House of Lords.
Farron said the party's peers will also make another effort to ensure the country has a second referendum on the UK's final Brexit deal.
"Over the next few weeks, Liberal Democrats in the House of Lords will seek to make changes to the Government's plans," he said.
"Our goal will be to protect Britain's membership of the single market, protect the rights of EU citizens in the UK and to give the people the final say on Theresa May's deal."
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.