Prime Ministerial hopeful Liz Truss was forced to dramatically stop mid-answer during a TV debate today when an off-camera "medical issue" shocked viewers - and the candidate herself.

Ms Truss, who was taking part in a debate held by The Sun and TalkTV, uttered an "oh my God" as viewers heard a crash in the background of the broadcast this afternoon.

It is unclear what happened off-camera, but host company News UK said it was a "medical issue".

Watch the moment Talk TV leadership debate pulled off air as Kate McCann faints

The incident brought a dramatic reaction from the Foreign Secretary, who threw her hands to her face and looked concerned.

She moved towards the scene of the disturbance before the cameras cut from the live feed.

A News UK spokesperson said: "There's been a medical issue, it's not a security issue and the candidates are okay.

"If we can get back on air, we will."

It was later announced that the debate would not continue, with TalkTV tweeting: "Kate McCann fainted on air tonight and although she is fine, the medical advice was that we shouldn't continue with the debate.

"We apologise to our viewers and listeners."

What happened during the TalkTV debate? 

Before the debate was cut, the candidates had discussed whether taxes on large corporations should be raised.

Former chancellor Rishi Sunak said it was “entirely reasonable” to ask the largest companies to pay “a bit more” tax because they received taxpayer-funded support during the pandemic.

He told The Sun/TalkTV debate: “As we think about ‘well, how do we fix this problem, how do we fund the things, the public services that we rely on’, is it reasonable to ask the biggest companies in the country to pay a bit more tax?

“They still will pay a very generous rate of tax compared to most other countries.”

But Liz Truss, who would scrap the scheduled 19p to 25p increase in corporation tax, said: “I am not talking about cutting corporation tax, I’m talking about not raising corporation tax.

“Under Rishi’s plan we will end up raising corporation tax to the same level it is in France, more than 10 percentage points higher than it is in Ireland.”

Mr Sunak’s policies would make the UK less competitive and push the country into recession, she claimed.

Sunak had also been asked if he had the “guts to stand up to (Vladimir) Putin”.

Andrew from London, a coordinator for a logistics company at Heathrow Airport, said: “My main worry is the winter fuel bills, what do you plan to do about the winter full bills?

“And, for Rishi, I want to ask you a question, do you actually have the guts to stand up to Putin this winter when he turns off all the gas pipes to Europe?”

Mr Sunak said: “Yes, Andrew, is the quick answer  - and the reason you can believe me is because as chancellor I did a couple of things that demonstrates that strength.

"A year and a half ago I made sure that our armed forces got the largest uplift in funding that they’ve had since the end of the Cold War to make sure that we’re protected against threats, like Putin.

“As chancellor I also worked with all my finance ministers around the world to put in place a sanctions package - the likes of which we had never seen, to try and tighten the grip on Putin’s war machine, to stop funding going to him - and it does require toughness to stand up to him, and it is going to require all of us to go through some difficult times.”

Oil companies have seen skyrocketing profits in recent months.

Shell, Europe's largest oil company, reported a record $9.1 billion profit in the first quarter of this year - and analysts expect it to rake in an additional $11 billion in the second quarter.

Liz Truss, meanwhile,  said it was “morally wrong” to raise taxes during a cost-of-living crisis in an attack on the former chancellor's policies.

The Foreign Secretary told the Sun/TalkTV debate: “What has happened is that the tax has been raised on families through national insurance so that they are having to pay more money to the Treasury.

“I do think it is morally wrong at this moment when families are struggling to pay for food that we have put up taxes on ordinary people when we said we wouldn’t in our manifesto and when we didn’t need to do so.”

Mr Sunak shot back, saying it was “morally wrong” to heap more debt on future generations.

He said he was “brave” to introduce a £12 billion tax increase to pay for health social care, telling the debate: “I made sure we got the NHS the funding it needed to help work through the backlogs, get everyone the care they needed and do that as quickly as possible.

“It wasn’t an easy thing for me to do, I got a lot of criticism for it, but I believe it was the right thing to do as I don’t think we can have an NHS which is ultimately the country’s number one public service priority that is underfunded and not able to deliver the care it needs.

Additional reporting: Rebecca Wilks; PA Wire