Donald Trump has stepped up his war of words with British officials over what he calls the UK's "massive Muslim problem", claiming more British Muslims join Isis than the Armed Forces.
The Republican presidential front-runner has been engaged in a spat with officials after his claim this week that parts of London were so radicalised that police refused to enter and his call for a ban on Muslims entering the US.
A petition to ban Mr Trump from the UK had gathered more than 530,000 signatures by last night (Friday) and the British ambassador to the US broke with diplomatic protocol to join the chorus speaking out against him.
"There is somebody called Donald Trump running in your presidential campaign and he again spoke this morning about the UK, saying that we were busy disguising a massive Muslim problem," Sir Peter Westmacott said. "That's not the way we see it. We are very proud of our Muslim community in the United Kingdom."
He later told The Daily Telegraph: "It's not my job to intervene in domestic issues but, where he [Mr Trump] is talking about my country, it's my job to point out where those comments are in our judgment wrong or unhelpful to the cause of fighting back against this form of terrorism."