Theresa May and Jeremy Corbyn were both facing a furious backlash from their parties last night amid growing scepticism over the prospects of their talks finding a way through Brexit.

No 10 and Labour claimed initially that the leaders had had a “constructive” meeting after they spent an hour and 40 minutes in the Commons working through options. They agreed to set up a working party to meet today.

Sources on both sides, however, were downbeat last night about the chances of success. Mrs May, who was hit by two more resignations from her government after inviting Mr Corbyn to the talks, is understood to have refused to say whether she would soften her position on a customs union. She continues to push back strongly…