President Donald Trump has long bet that he can scare allies into submission. It's a gamble that is increasingly being tested ahead of the Group of Seven summit beginning Monday in Canada.

Global trade will be a major focus at next week’s G7 summit as world leaders gather in Alberta, including U.S. President Donald Trump, who will be making his first appearance at a major international event since returning to the White House in January.

Britain and Canada have deep ties in defence, climate and culture sectors, but Starmer's visit comes amid strained trade negotiations.