British Foreign Minister James Cleverly will seek to bolster support for Ukraine on a trip to the United States and Canada which begins on Tuesday, ahead of the first anniversary of the invasion by Russia.
Britain has been a steadfast supporter of Kyiv since Russia's invasion last February, and at the weekend pledged to send 14 Challenger 2 tanks and other heavy weaponry to Ukraine.
Germany is under pressure to send Leopard 2 tanks to Ukraine, but its government says such tanks should be supplied to Ukraine only if there is agreement among Kyiv's main allies, particularly the United States.
Cleverly will tell U.S. Secretary of State Antony Blinken and Canadian counterpart Melanie Joly that it is the right time to go "further and faster" to give Ukraine military support.
"Today we stand united against Putin's illegal war, and we will continue to use our uniquely strong defence and security ties to ensure that, in the end, the Ukrainian people will win," Cleverly said in a statement ahead of the trip.
Iran and Israel targeted each other with missiles and airstrikes early on Saturday after Israel launched its biggest-ever air offensive against its longtime foe in a bid to prevent it from developing a nuclear weapon.
Israeli fire and airstrikes killed at least 35 Palestinians across the Gaza Strip, most of them near an aid distribution site operated by the US-backed Gaza Humanitarian Foundation, local health authorities said.
The death toll from the Air India plane crash in Ahmedabad rose to 270 on Saturday, as grieving families expressed frustration over delays in the release of victims' bodies, many of which were badly charred in the tragedy.
US President Donald Trump urged Iran on Friday to make a deal on its nuclear programme before it faced more attacks from Israel that he said would be "even more brutal."
Israel launched widescale strikes against Iran on Friday, saying it targeted nuclear facilities, ballistic missile factories and military commanders and that this was start of a prolonged operation to prevent Tehran from building an atomic weapon.