Niall Paterson, the host, fumed at Ms Thornberry, reiterating that Jeremy Corbyn could not keep getting “fairly fundamental basics wrong”.
Speaking on Sky News, the host reviewed Mr Corbyn’s performance in the live BBC TV debate and claimed the Labour leader got his facts wrong.
He said: “Once again we saw the Labour leader getting his facts wrong.
“He said this ‘that we have the lowest growth rate of any industrial country.’
The Sky News host blasted Jeremy Corbyn for continuing to get his facts wrong in the debate
“That’s actually not true in 2016 we were second only to Germany.
“I mean he keeps getting these fairly fundamental basics wrong.”
Ms Thornberry, the Shadow Foreign Secretary, snapped back arguing the real issue in the UK at the moment was that many Brits had not been given a pay rise since the financial crisis.
She fumed: “I’ll tell you what the fundamental is, the fundamental is that Britain hasn’t had a pay rise.
“The fundamental is that since the crash people’s living standards are now lower than they were before the crash.
“That is under this Conservative government and they have no plans for doing anything about it.
“They have no plans at all and we do. We have a fully costed manifesto.”
The Labour Party leader faced scrutiny after a car-crash interview on Radio Four’s Woman's’ Hour.
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Mr Corbyn failed to outline how much his childcare policy would cost and was filmed attempting to reach for his iPad as he struggled to reveal the figures.
I mean he keeps getting these fairly fundamental basics wrong
Sky News host
The 68-year-old Labour politician has pledged to provide 30 hours of free childcare for all children aged two to four as one of his key policies.
Ms Thornberry finished with one final dig at the Home Secretary, who took Theresa May’s place in the BBC TV debate.
She added: “Listen to Amber Rudd when she says we need a strong economy to pay for public services and yet she says you have to cut public services in order to have a strong economy, none of this makes sense.
“We have an alternative. It doesn’t have to be this way. People have a choice. They can vote for Labour on June 8 and get a different government and an entirely different vision for Britain.”
The TV election debate – in pictures Wed, May 31, 2017
The televised debate saw Jeremy Corbyn, Amber Rudd, Paul Nuttall, Caroline Lucas, Angus Robertson, Tim Farron and Leanne Wood go toe-to-toe
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The politicians taking part in the debate
During the BBC debate, Ms Rudd targeted the Labour Party leader for his manifesto promises, claiming he would not be able to pay for them.
She said: “Jeremy I know there is no extra payment you don’t want to add. No tax you don’t want to rise, but the fact is we have to concentrate our resources on the people who need it most.
“We have to stop thinking as you do, that there is a magic money tree. You have to be accountable on the money you want to spend.”
Ms Rudd also took a swipe at the Shadow Home Secretary during the show suggesting she would have liked to debate Diane Abbott.