US President Donald Trump, German Chancellor Friedrich Merz and French President Emmanuel Macron are among those gathering in the Canadian province of Alberta for three days of talks.
Chancellor Rachel Reeves has said that the UK could “potentially” support Israel in its conflict with Iran.
Talking to Sky News, the Chancellor said: “I’m not going to rule anything out at this stage... it’s a fast moving situation, a very volatile situation.”
She noted that the UK has so far not been involved, but emphasised that “we’re sending in assets to both protect ourselves and also potentially to support our allies”.
Iran issued a warning on Saturday to the US, the UK and France that their military bases and ships would be targeted if they help block the Iranian missile and drone retaliation for Israel’s attack.