The Foreign Office has mounted an unprecedented operation to support British citizens in the Middle East, as airstrikes throw travel in the region into chaos.

Sky News understands UK officials are working on plans for potential routes for the evacuation of tens of thousands, should airspace in the Gulf remain off-limits.

British Foreign Secretary Yvette Cooper told Sky News on Monday morning that the UK government is “working on every possible option” and teams have been deployed to the Gulf countries to help Britons there.

“Of course, we want people to get safely home as swiftly as possible,” she told Mornings with Ridge and Frost.

As Iran retaliates to US and Israel strikes with counterattacks on military and other targets across the Gulf, major airports have been forced to close for a second day, including the world’s busiest international hub in Dubai.

It has sent shockwaves and the most severe business disruption through the Gulf since the COVID-19 pandemic.

Ms Cooper said about 300,000 British citizens are in the region, including residents, tourists, and those in transit.

By Monday morning, 102,000 – most of them in the United Arab Emirates (UAE) – have registered their presence in the Middle East on an online government platform launched after the conflict began on Saturday.

The majority have been moved to hotels, in what is one of the biggest consular cases the Foreign Office has had to deal with in recent years.

On Sunday evening, Prime Minister Sir Keir Starmer said: “Over the last two days Iran has launched sustained attacks across the region at countries who did not attack them.

“They’ve hit airports and hotels where British citizens are staying.

“This is clearly a dangerous situation.”

British nationals are currently being advised to stay where they are, follow the instructions of local authorities and monitor the Foreign Office’s travel advice.

On Sunday, the PM also said he would permit the US to use British bases ‌for defensive strikes against Iran. The Liberal Democrats warned against a “slippery slope” that could see the US “drag Britain into another prolonged war in the Middle East”.

But Ms Cooper insisted allowing the US use of UK bases is “about the defence of our partners in the Gulf” and of countries “where we have so many British citizens and interests”.

“We continue to believe that we want to seek a negotiated solution, a diplomatic process,” she added.

Thousands of flights cancelled

More than 3,400 flights were cancelled on Sunday across seven airports in the Middle East, according to flight tracker Flightradar24.

Disruption has hit Doha in Qatar – which handled 54 million passengers last year – as well as Bahrain, Israel, Jordan, Kuwait, UAE and Saudi Arabia.

And with airports in Qatar and the UAE often used for connecting flights, the disruption could hamper onward travel plans for passengers across the globe.

Even further afield in Bali, more than 1,600 tourists were stranded after five flights to the Middle East were cancelled or postponed at I Gusti Ngurah Rai International Airport, officials said.

Departures and arrival boards at Heathrow, Gatwick, and Manchester airports listed multiple flights serving destinations across seven countries as cancelled.

Aviation analyst Cirium estimates that 90,000 passengers per day fly with Emirates, Etihad, and Qatar Airways at Dubai, Abu Dhabi, and Doha alone.

‘Drones were exploding in the sky above us’

Jo Hummel, 43, and her husband Chris Jenkins, 46, were travelling back from Thailand with their two children, Ivy, 17, and Kit, 12, when their connecting flight from Doha to London was cancelled.

Ms Hummel, from the Isle of Wight, said: “We touched down into Qatar and people were opening up their phones and there was a national alert coming through in Arabic. We realised something was going on.

“We were transferring in Doha to London and everything was getting cancelled.”

She continued: “Qatar [Airways] staff came and offered us a hotel room, at first we were going to stay at the airport, but now we are 20 minutes away in a hotel organised by the airline.

“I had to get them out of bed this morning because drones were exploding in the sky above us and we have big windows. It’s quite frightening.

“As a mother, I’m scared out of my wits and trying to keep calm, but also be organised.

“I don’t think anything will leave until it’s safe.”

In new travel advice issued overnight, the Foreign Office advised UK nationals against all but essential travel to Bahrain, Israel, Palestine, Qatar and the United Arab Emirates.

In a statement, the department said: “British nationals in Bahrain, Israel, Palestine, Qatar and United Arab Emirates can register their presence to receive direct updates from the FCDO on the situation in the Middle East.

“You should continue to follow travel advice and the advice of the local authorities.”