London MayorSadiq Khanhas wasted no time in renewing his row withDonald Trump.

We will always be pro-women, pro-diversity, pro-climate and pro-human rights.

The messagecontrasted with the tone of Keir Starmer, the UK prime minister and leader of the Labour Party.

London Mayor Sadiq Khan and Donald Trump

London Mayor Sadiq Khan and Donald TrumpGetty

I look forward to working with you in the years ahead, said Starmer.

Khan and Trump have history.

Trump challenged Khan to an IQ test and said he would remember the barbs.

Donald Trump and ABC News' Terry Moran

Giant baby Trump balloon flies over London

A year later, Trump described Khan as a stone-cold loser.

A spokesman for Khan said the childish insults should be beneath the president of the United States.