Britain is prepared to deploy a squadron of RAF Typhoons based in Qatar to patrol over the strait of Hormuz as part of a multinational mission to keep open the strategic waterway once the Iran war comes to an end.

The UK military also offered to deploy mine-hunting drones and specialist divers to help clear the strait mined by Iran – but no decision has been made on whether HMS Dragon or another warship would also be deployed.

The Typhoon proposal was at the heart of the offer made by British military planners during a 30-country two-day meeting held at the UK’s Northwood headquarters and organised jointly with France.

Eight of the fast jets are currently based in Qatar and a number were active in shooting down Shahed drones in defence of allied countries in the Gulf during the 38-day war in the Middle East that followed the US-Israel attack on Iran.

Germany, Norway, South Korea and Australia were among the countries who sent representatives to the meeting, which ended on Thursday. British sources would not confirm if the US participated, though they insisted the Americans were “kept abreast”.

John Healey, the defence secretary, dropped into the meeting in the afternoon. He told planners present that their task was to develop “practical military options” and “a coordinated joint plan to safeguard freedom of navigation in the strait”, in a joint statement issued with his French counterpart, Catherine Vautrin.

Nevertheless, the status of the multinational mission remains unclear. At times, Donald Trump demanded that other countries helped open the strait of Hormuz; while at others he suggested the US did not need any help.

The UK and other countries have said they will not participate in forcing open the strait with military action against Iran, but the UK and France are willing to act if there is a peace deal or sustainable ceasefire, to protect oil tankers and other merchant shipping from what it is hoped would be a low level of threat.

The Royal Navy has come under repeated criticism for having a limited number of warships available to deploy, after the British Akrotiri airbase in Cyprus was hit by a drone in early March, on the second day of the war.

HMS Dragon arrived in theatre three weeks later after being hauled out of dry dock, several days after France and other countries had sent warships into the eastern Mediterranean, raising questions about the readiness of the Royal Navy.

Last month, Trump described Britain’s two aircraft carriers as “toys” and said the UK was only willing to send them “when the war is over” – though Britain has not indicated it will send either flagship to the Middle East.

The UK armed forces have been led by Richard Knighton, previously the chief of air staff, since the autumn, and during the Iran crisis there has been a shift in emphasis from the navy to the air force.

When fighting broke out, the UK military considered it did not need to have a warship present in or near the Middle East, because the airbases of Cyprus provided the same function as an aircraft carrier. Instead, the focus was on deploying RAF jets to Qatar and Akrotiri as well as counter-drone crews to help defend allies if needed.