No red carpet for Trump, says London's Khan
http://edition.cnn.com/2017/07/17/politics/sadiq-khan-trump-uk-visit/index.html
The impolite man has no right to meet the UK Queen. His attitude may dishonour the dignity of British people and disrupt the relationship between the US and the UK.
On the other hand, he is worthwhile meeting London's Mayor. That's because it can improve Trump's bias about Islam, considering that he has praised several presidents after official meeting, even if he had criticized them beforehand.