Sadiq Khan has attacked Donald Trump for a second time as the hostility between the pair intensified.
The new Muslim Mayor of London said the Republican presumptive nominee for US President would fail in his campaign because of his "ignorant, divisive and dangerous" views.
The bitter feud was resurrected after Trump called Khan "ignorant" and "nasty" in an interview with ITV's Good Morning Britian.
A spokesman for Khan hit back: "Donald Trump's views are ignorant, divisive and dangerous – it's the politics of fear at its worst and will be rejected at the ballot box, just as it was in London.
"Sadiq has spent his whole life fighting extremism, but Trump's remarks make that fight much harder for us all – it plays straight into the extremists' hands and makes both our countries less safe."
Trump's comments came after he apparently offered a hand of peace to Khan, saying there would always be exceptions to his call for a "total and complete shutdown on Muslims entering the US".
But in his interview aired on Monday morning Trump said he would remember the response he got from the mayor who rejected Trump's offer of an "exception".
Trump said: "He doesn't know me, hasn't met me, doesn't know what I'm all about.
"I think they were very rude statements and, frankly, tell him I will remember those statements. They are very nasty statements.
"When he won I wished him well. Now, I don't care about him, I mean, it doesn't make any difference to me. Let's see how he does, let's see if he's a good mayor."
He went on: "I have many Muslim friends... I was with one the other day, one of the most successful men, he's Muslim and he said, 'Donald you have done us such a favour, you have brought out a problem that nobody wants to talk about'."
