Britain is planning what could be the largest mass evacuation in a generation of Britons who remain stranded in the Middle East as a result of the chaos in Iran.
At least 94,000 Britons in the United Arab Emirates and other Gulf nations have now registered their locations and contact details with the Foreign Office.
Sir Keir Starmer, meanwhile, has said there are around 200,000 Britons within the region, either on holiday or travelling.
Those in the area have been told to stay where they are at the moment, but the Government is now making contingency plans to evacuate them if the airspace remains closed for a prolonged period.
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Foreign Secretary Yvette Cooper is said to be gathering all ambassadors in the region, including those of Qatar and the UAE, to discuss plans.
She is expected to make her first remarks on the crisis on Monday after speaking to regional counterparts including US Secretary of State Marco Rubio and other G7 foreign ministers.
One option for evacuation on the table would be to bus Britons through the desert into Saudi Arabia, then fly them home from there.
If any rescue is made, it is likely to become the biggest mass evacuation since the Second World War.
Huge plumes of smoke rose above Dubai Airport after more Iranian strikes | X
Several thousand Britons were evacuated last year after missile strikes between Israel and Iran.
But this time, the Foreign Office has urged all Britons within Israel, Bahrain, Palestine, Qatar, the UAE, and Kuwait to register their information in order to receive travel updates and guidance.
All travel to Iran and Iraq is now strictly advised against, with the Foreign Office adding there is a "risk of further escalation, and events are fast-moving and unpredictable".
Travel to Lebanon is also advised against in most regions, as Israel has said it is striking Hezbollah targets across the country.
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Flights in Dubai have been cancelled after an attack killed one person and injured 11
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Flights at major hubs across the Middle East were cancelled en masse after Iranian attacks on airports in Dubai and Abu Dhabi killed one person and injured 11.
Almost four in five flights from Dubai International had been grounded, as of Sunday morning.
Cricket coach Jonny Bairstow is among those holidaying with family - and may now be stuck in the country.
He responded to Sir Keir's statement on Iran on social media pleading: "Can you get us home???"
Other high-profile figures to have voiced their fears about being stuck in the Middle East include broadcaster Richard Keys and Kate Ferdinand, the wife of ex-footballer Rio.
Kate posted pictures of the couple from Jumeirah Beach Hotel in Dubai last week, and was later forced to add: "We are safe. We are hoping for a calmer evening tonight, last night was very scary."
Foreign Secretary Yvette Cooper is said to be talking to her foreign counterparts, including Marco Rubio, to make evacuation plans
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Human rights lawyer Ivon Sampson, who lives in Dubai, told GB News that many in the expat community feared being trapped.
"They all had the same concern that if it is a long, drawn-out war, we will all be stuck in Dubai," he said.
"I was supposed to go back tomorrow for a trial and mediation next week, and that's obviously been put on hold."
Another British expat in Dubai told GB News he heard loud booms throughout the weekend and could see missiles and drones being intercepted in the pristine blue skies.
The Foreign Office is in contact with the region's main airlines Qatar, Emirates, and Eithad Airways, on a four-hourly basis.
The Foreign Office has been approached for comment.
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