Donald Trump’s working visit to the UK has been pencilled in for February 26-27, according to sources.

Despite claims by Theresa May that no date has been set for the US president’s first visit to the UK since entering the White House, the trip has been in the diary for at least 10 days, according to those familiar with the plans.

The timing of the visit, which is expected to coincide with the opening of the new US embassy in London, remains unchanged despite last week’s diplomatic row.

May’s ties with Trump came under pressure after the prime minister attacked the president for promoting a British far-right extremist organisation to his 44m social media followers. The ensuing Twitter spat prompted a storm of protest, with