Talks between the government and Labour aimed at trying to break the Brexit deadlock have resumed in London.
The process has largely been on hold since before Easter, when ministers announced a series of working groups to discuss individual issues.
Labour’s Sir Keir Starmer said he wanted to “pin down” the government on what changes it was willing to make.
No 10 dismissed claims the two sides were killing time, saying talks were “serious” but “difficulties” remained.
The BBC’s political correspondent Iain Watson said he understood there would be an attempt in the coming days to reach a compromise on the UK’s future customs arrangements with the EU – a key sticking point.
Ministers insist it is still their aim to get MPs’ approval for the terms of the UK’s exit from the EU by 22 May so the country does not have to take part in elections to the European Parliament a day later.