London: Britain has joined the United States in lobbying Australia to join the US-led mission to protect ships passing through the Strait of Hormuz from the Iranians, it can be revealed.

It comes after Britain, which had favoured an EU-led mission to escort vessels through the Persian Gulf, changed tack and joined the US-led mission, after its European partners were lukewarm on the idea.

HMS Montrose accompanies a commercial ship through the narrow Strait of Hormuz. Credit:AP

In announcing the shift, the UK said both the UK and US were committed to working with allies and partners to encourage others to join and broaden the response to a truly international problem.

US Secretary of State Mike Pompeo all but requested Australia contribute during his visit to Australia for AUSMIN talks this week, but the government has not yet made any commitment.