Britain is ready to fight in the Pacific if conflict breaks out over Taiwan, the Defence Secretary has suggested.

John Healey was speaking on board the HMS Prince of Wales alongside Richard Marles, Australia’s deputy prime minister, as the ship docked in Darwin to join war games with allies, including the US.

Asked by The Telegraph about what the UK is doing to help countries like Taiwan to prepare for potential escalation from China, Mr Healey said: “If we have to fight, as we have done in the past, Australia and the UK are nations that will fight together. We exercise together and by exercising together and being more ready to fight, we deter better together.”

His comments are among the most robust from a British representative on the subject of possible engagement in a future war in the region.

Mr Healey, however, said he was speaking in “general terms”, and said the UK would prefer to see any disputes in the Indo-Pacific resolved “peacefully” and “diplomatically”.

He added: “We secure peace through strength, and our strength comes from our allies.”

Xi Jinping, the president of China, has not ruled out the use of force in the “reunification of the motherland”. Beijing maintains it has sovereignty over Taiwan, which the government in Taipei firmly rejects.

Experts have cautioned that an invasion of Taiwan could result in a conflict that would involve countries across the globe.

Mr Healey acknowledged that “threats” are increasing in the Indo-Pacific region, where China’s military has seized contested reefs and is accused of intimidating its neighbours.

The HMS Prince of Wales carrier group has sailed with advanced F-35 fighter jets from Singapore to northern Australia for the first time since 1997, and will continue towards Japan, where it is likely to sail close to Taiwan.

The British Government has previously refrained from commenting on whether it would intervene if a conflict were to break out. The Royal Navy has two permanent patrol vessels in the region.

Most countries follow the United States in its position of “strategic ambiguity” where it generally refrains from commenting on whether or not it would come to Taiwan’s defence in the event of a war.

Joe Biden, the former US president, broke this rule of thumb on several occasions and had said the US would support the island in pushing back against China. Donald Trump has refrained from taking the same outspoken approach, but officials in the Pentagon are preparing for conflict.

The current US government has also said that it will be reviewing its part in the Aukus agreement, a trilateral security agreement between the US, Australia and the UK, as part of the Trump administration’s “America first” strategy.

Regarding Taiwan, Australia has also taken a more cautious approach. Anthony Albanese, the country’s prime minister, last week refused to comment on whether the country would join with the US and other allies in fighting back against China if a conflict broke out.

As part of its National Security Strategy published earlier this year, the UK Government recognised that “there is a particular risk of escalation around Taiwan”.

Gavin Williamson, who served as the UK’s defence secretary from 2017 to 2019, said that the UK is probably speaking more candidly as the increasing threat in the Indo-Pacific becomes clearer.

“I think there’s a realisation that by being completely silent it doesn’t make it more or less likely. Deterrence is about setting out the consequences that will come about as a result of other people’s dangerous or malign actions,” Sir Gavin told The Telegraph.

“It’s really important that people like the UK Defence Secretary are being clear about the consequences of actions.”

The decision to send the HMS Prince of Wales, which is the UK’s largest strike carrier group, on a nine-month deployment through the Pacific is indicative of the UK’s awareness of this rising threat level.

The ship’s deployment to Darwin, a city in northern Australia, is also telling of the close ties between London and Canberra, which would be key to any potential future conflict in the Indo-Pacific.

Mr Healey noted “as threats are increasing, the partnerships like the UK and Australia matter more than ever”.

This is the first time in nearly 30 years that a British carrier strike group has docked in Australia and the first time that a non-US carrier has participated in Australia’s annual military drills known as Talisman Sabre, which were the largest ever this year.

The two countries also signed the Geelong Treaty this weekend, a new 50-year agreement cementing their part in the Aukus pact and committing to build a new class of nuclear-powered submarines.

The arrival of the HMS Prince of Wales in Darwin is also part of the UK’s effort to assert the right to freedom of navigation through the Taiwan Strait – the narrow body of water separating China from Taiwan.

David Lammy, the Foreign Secretary who was also on board the HMS Prince of Wales earlier in the day, has previously said that the UK plans to conduct more freedom of navigation operations in the Taiwan Strait.

“We have a direct interest in the international rules, the freedom of the seas, the freedom of navigation and the stability and security in the Indo-Pacific,” said Mr Healey.

Last month, the HMS Spey, a Royal Navy patrol ship, transited the Taiwan Strait, drawing praise from Taiwan and strong criticism from China.

The UK does not comment on its ships’ future movements, but many suspect the HMS Prince of Wales will transit through the contested Strait as it sails to its next destinations in South Korea and Japan.

However, while the UK may be increasing its attention towards the Indo-Pacific, this will not involve greater engagement with Taiwan.

When asked whether the UK may engage more formally with Taiwan, Mr Healey said: “There’s no change in the UK’s approach to Taiwan.”

Sir Gavin, who also faced the question of engagement with Taiwan while he was in office, said that the UK is only likely to shift its approach “if China becomes ever more and more aggressive”.

Conflict over Taiwan would probably have massive global implications as the country produces much of the world’s most advanced computer chips.