Supporters take pictures with Jeremy Corbyn at last month’s march in support of the NHS. His party has edged ahead of the Tories in the polls in the wake of Theresa May’s Brexit compromise

Labour has taken a two-point lead over the Tories in the first indication that the row over Theresa May’s Chequers compromise has damaged the party.

After days of briefing, resignations and infighting, the Conservatives now trail Labour for the first time since March, according to the latest YouGov opinion poll.

It puts Labour on 39 per cent, which is unchanged since the weekend, and the Tories on 37 per cent, which is down two points, with the Lib Dems on 9 per cent.

This is significant because the Tories consistently enjoyed leads of four to five points through parts of March as well as April, May and June. The poll of 1,732 British adults was taken on Tuesday and Wednesday.

There has also been a