Leaders of some of the world’s biggest economic powers will arrive in the Canadian Rockies on Sunday for a Group of Seven summit overshadowed by a widening war across the Middle East and U.S. President Donald Trump’s unresolved trade war with allies and rivals alike.

Protests during the upcoming G7 leaders summit in Kananaskis, Alta., may be starkly different than demonstrations happening this week against immigration crackdowns in the United States.

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