MPs have voted to begin the Brexit process by March 2017 - but only if they see the plan first

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MPs have overwhelmingly backed Theresa May's plans to trigger the process for quitting the European Union by the end of March next year, on condition the prime minister reveals her strategy.

A symbolic motion, which is non-binding, was approved by 448 votes to 75, majority 373.

Faced with a revolt by up to 40 Tory MPs, May on Tuesday bowed to pressure and backed a Labour motion which said she should publish a plan before triggering the formal process of leaving.

In return, most of the rebels and Labour backed a compromise Government amendment to support May's pledge to invoke Article 50 to start Brexit before April.

Ken Clarke speaks during the debate (PA)
Ken Clarke speaks during the debate (PA)

MPs held two votes, with the first in favour of adding the Government amendment to the original Labour motion - by 461 votes to 89, majority 372.

This was opposed by 23 Labour MPs and one Conservative - former chancellor Ken Clarke.

The Labour rebels included Ben Bradshaw, David Lammy and former shadow chancellor Chris Leslie.

The amendment was also opposed by five Liberal Democrat MPs, three Plaid Cymru MPs and 51 SNP MPs.

Meanwhile, some 150 Labour MPs backed the Government's amendment.