It’s the diplomatic equivalent to being invited for dinner at someone’s house and committing arson. British lawmakers have united across party lines to condemn Donald Trump on the first day of his trip to the country after he suggested prime minister Theresa May has ruined Brexit and tipped her arch rival, Boris Johnson, to be an excellent leader. Conservative member of parliament Sarah Wollaston said Trump was “determined to insult” May and added: “The divisive, dog-whistle rhetoric in his Sun interview is repulsive. If signing up to the Trump world view is the price of a deal, it’s not worth paying.” Ben Bradshaw, Labour member of parliament, wrote: “Our prime minister is so weak she still rolls out the red carpet for a man who does nothing but insult her. Humiliating.” Former leader of the Labour party Ed Miliband tweeted a link to a news story about Trump’s comment, and said: “The theory that if we are nice to Trump he’ll be nice to us doesn’t seem to be going brilliantly...” Trump is due to hold talks with May and the Queen Friday as a huge protest march, tipped to number tens of thousands of people, snakes its way through the streets of London.