ukraine has demanded a meeting with russia within the next forty—eight hours to explain the build—up of moscow's forces on its border. and the ukrainian ambassador to the uk has suggested his country might consider dropping its long—held ambition tojoin nato. russia denies it's planning an invasion. police in canada say they've cleared the remaining protesters blocking a key bridge between canada and the united states, after a week of disruption. despite a court order to end the demonstration against covid restrictions, trucks and cars had continued to block the ambassador bridge in ontario. people in switzerland have supported a ban on virtually all tobacco advertising. 56% backed the move in a referendum despite opposition from the swiss government and parliament. the charity, action on smoking and health, says switzerland's tobacco rules were lax compared with the rest of europe. ashleyjohn—baptiste is a bbc