Theresa May is facing pressure from within her own Government to cancel Donald Trump’s state visit to the UK after one of her ministers said the US President had “crossed a line”.

Sam Gyimah, the Justice Minister, said he would feel “deeply uncomfortable” if the visit went ahead after an unprecedented row broke out between Mrs May and Mr Trump over the latter’s decision to retweet far-Right anti-Muslim propaganda.

Mrs May said that Mr Trump was “wrong” to have promoted the material originally posted by Britain First to his millions of Twitter followers.

But the US President hit back and said Mrs May should not “focus on me” but on the “destructive Radical Islamic Terrorism that is taking place within the United Kingdom”.

The comments prompted a diplomatic storm with UK politicians from various parties lining up to criticise Mr Trump and to call for his state visit to be cancelled.