London: Donald Trump has grown tired of Theresa May's "school mistress" tone, the president's allies have said amid anticipation the pair will not hold talks in Canada.

Trump is said to bristle at the Prime Minister's phone calls, as May launches into policy detail rather than broader conversation. A senior US diplomat said her frequent demands annoy him, something he sees as taking advantage of the UK-US relationship.

UK PM Theresa May Credit:AP

A long-time friend revealed Trump complains when she admonishes him in public after being deemed to have stepped out of line. And a former White House official, who attended meetings between the pair, confirmed the frosty relationship: "No offence, but she is basically a school mistress. I'm not sure anyone gets on well with her."