The government is warning people not to travel to Israel under any circumstances, as the country’s missile exchange with Iran shows no sign of abating.

On Friday, the Foreign Office warned against “all but essential travel” to most of Israel.

The areas around Gaza, the West Bank and the Golan Heights were already classed as red zones, with warnings to avoid travel to these areas.

But the government has now updated the warning for the remainder of the country to red.

Follow live: Tehran and Israel exchange strikes

This puts Israel on the same level as Iran, and the change of advice is also likely to impact travel insurance.

However, with Israel’s airspace closed, it is unlikely many people will be attempting the journey, and Israel’s national airline El Al has announced it is cancelling flights to and from many European cities, as well as Tokyo and Moscow, until 23 June.

The change in travel advice comes after a second night of ballistic missile barrages from Iran following Israel’s attack in the early hours of Friday morning.

On Sunday morning, Israel’s health ministry said 12 people had been killed over the past day, taking the total since Friday to 15. It also said 385 people had arrived at hospital with injuries overnight.

Iran has not provided a total number of deaths or overall casualties, but has claimed dozens have been killed.

Iran’s health minister has said most of those injured and killed in Israeli strikes were civilians. According to comments carried by news agency IRNA, he said the majority were women and children.

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What is the UK doing?

The UK government is sending military assets, including fighter jets, to the Middle East.

While the prime minister would not confirm to reporters that UK forces could be used to defend Israel from future Iranian attacks, the chancellor told Sky News earlier that the government is “not ruling anything out”.

Speaking to Sky’s Sunday Morning With Trevor Phillips, Rachel Reeves said sending military assets to the Middle East “does not mean that we are at war”, and emphasised that “we have not been involved in these strikes or this conflict”.

“But we do have important assets in the region,” she continued. “And it is right that we send jets to protect them. And that’s what we’ve done. It’s a precautionary move, and at the same time, we are urging de-escalation.”

Pushed on the question of what the UK would do if Israel asked for support with its operations, the chancellor replied: “I’m not going to rule anything out at this stage. It’s a fast-moving situation, a very volatile situation. But we don’t want to see escalation.”

A helicopter carrying Hindu pilgrims has crashed in India, killing seven people on board.

The accident happened within minutes of the helicopter taking off, officials said, on what should have been a 10-minute flight.

The helicopter was flying to Guptkashi, a prominent Hindu pilgrimage site in the Himalayas, from Kedarnath temple town in the northern Indian state of Uttarakhand.

It comes three days after an Air India flight crashed less than a minute after taking off from Ahmedabad airport in northwestern India, killing at least 270 people.

The helicopter, which was operated by private helicopter service Aryan Aviation, went down in a forested area several miles from the Kedarnath pilgrimage route at around 5.30am local time.

Officials said the crash was believed to have been caused by poor weather conditions.

Authorities say they have launched a search and rescue operation and are expected to review operational protocols for flights in the region.

The dead include the pilot and pilgrims from the neighbouring state of Uttar Pradesh and western states of Maharashtra and Gujarat, according to officials. The bodies were badly burned in a fire that followed the crash, they said.

Tens of thousands of pilgrims visit Kedarnath, which is home to one of the four most sacred Hindu temple shrines, each summer. Many use helicopter services due to the difficult mountainous terrain.

Helicopter mishaps are not uncommon in the region, where sudden weather changes and high-altitude flying conditions can pose risks.

Earlier this month, a helicopter operating in the Kedarnath Valley made an emergency landing shortly after taking off on a highway due to a technical fault. The pilot was injured but all five passengers on board were unharmed.

In May, a helicopter crashed in Uttarkashi district, killing six people, including the pilot. One person survived.

Why did Israel attack Iran? Certainly, it was worried about the threat of a nuclear weapon being developed.

But it’s also becoming clearer that there was a second reason – that this is about laying the ground for regime change in Tehran.

Follow latest: Israel warns ‘Tehran will burn’ if it continues

Because, hours after his country launched its first, surprise attack, the message from Benjamin Netanyahu couldn’t be clearer – Iranians, he said, should overthrow their “evil and oppressive regime”. He said Israel’s attack would “pave the way for you to achieve your freedom”.

On the one hand, he would say that, wouldn’t he? The Iranian government does not recognise the legitimacy of the Israeli state and has called for its destruction, while funding proxy groups that have attacked Israel – including Hamas, Lebanese Hezbollah, and the Houthis in Yemen.

But perhaps this time there is more than just wishful thinking.

Although it’s very hard to gauge the level of opposition in Iran, it seems likely the majority of the population of 90 million are at least disenchanted with the regime.

Living standards have fallen and supplies are running short. While tens of billions of dollars have been spent on a nuclear programme, electricity is being rationed and cooking gas is running low.

Priority is being given to those who are close to the regime, notably the members of the Islamic Revolutionary Guard Corps (IRGC), a branch of the Iranian army that is fiercely loyal to the ruling regime.

The IRGC are crucial in propping up Ayatollah Ali Khamenei, the country’s 86-year-old supreme leader. Not only do they offer military power, but also domestic surveillance, intimidation and secret policing in order to stifle dissent.

So for any opposition to emerge, let alone flourish, the IRGC would need to be degraded – and that is precisely what Israel has done, targeting its senior leaders as well as bases.

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The regular army, so far, has been left alone. Israel’s gamble is that a majority of the rest of the military harbour the same dislike of the IRGC as the wider population.

It was no coincidence that Netanyahu quoted the expression “woman, life, freedom”, which was a rallying call during the 2022 protests in Iran – eventually suppressed by the IRGC.

It is very hard to believe that a coherent, public opposition movement will burst into life any time soon. Iranians are well aware their regime will respond with brutality against any attempted uprising.

Instead, dissidents seem to be biding their time and waiting to see if Israel continues its assaults, and whether they can sense genuine signs that the regime is starting to struggle to maintain control. If the cracks emerge, then regime change – or at least an attempt – is possible.

Possible, but not certain. “They will do anything to stay in power, and when other uprisings have happened, they’ve been successfully suppressed,” one Middle East diplomat tells me.

“And there is no unifying leader ready to step in. Even if there is regime change, it could be a military takeover rather than a popular uprising.”

Read more:
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And that leaves one final question – if Khamenei did feel his grip on power was failing, might he still have the time, desire and power to resort to final, desperate military actions? The truth is, we don’t know.

At the moment, the Middle East is a region full of unanswerable, high-risk questions.