A Labour MP has launched a scathing attack on migrants "making a mockery" of Britain's legal system after the High Court blocked Labour's deportation flight to France.

Speaking to GB News, James Murray, the Chief Secretary to the Treasury, said the decision by the court is "intensely frustrating" for the Government.

An Eritrean migrant set to be deported to France was granted leave to remain in the UK after claiming his experience of being "tortured and trafficked" should "prevent him from being returned".

The High Court blocked the migrant from being returned, becoming the second flight departing Heathrow Airport with zero migrants on board.

James Murray has hit out at Labour's migrant exchange deal with France, declaring it a 'mockery' of Britain's laws

Discussing the latest obstacle in Labour's plans to deport illegal migrants back to France, Mr Murray told GB News: "It's intensely frustrating, and I know that the Home Secretary has expressed quite how frustrated she is at this.

"And we all are, as Government ministers, frustrated by this last minute attempt to thwart what we were trying to do to stop people being deported."

Assuring that the Government is "determined" to begin deportations "imminently", Mr Murray added: "We are determined for the deportations to begin imminently.

"The Home Secretary has explained how she will be standing up for the British public's interest in court and she'll be fighting this every step of the way, because we want these deportations to go ahead imminently."

There were no migrants on the first two Air France flights from Heathrow to Paris | GETTY

Quizzed by host Stephen Dixon on Home Secretary Shabana Mahmood's more "robust" approach to the migrant crisis, the Labour MP told GB News: "There's been a huge amount of work over the last year when the former Home Secretary was in her position.

"Whether that's getting the Borders Bill introduced in Parliament and beginning to take that through and get that into law, whether that's closing hotels for asylum seekers, whether that's negotiating deals with the French and so on."

He continued: "We've now got Shabana Mahmood as the Home Secretary, and as you can see, she is saying as a result of what's happened in the last few days, she won't stand for it.

"She's intensely frustrated by it and she's going to do everything she can to fight it every step of the way."

Pressed by presenter Ellie Costello on whether the Government must "go further" in cracking down on legislation such as the Modern Slavery Act, Mr Murray declared that migrants have made a "mockery" of Britain's legal system.

Mr Murray told GB News that the Government wants deportations to begin 'imminently'

The Chief Secretary to the Treasury fumed: "I think really, to be honest, what has happened in this case makes a mockery of our laws and of our country's generosity.

"I think, as I understand it, this individual has decided they're a modern slave at this late stage, despite having never mentioned that before.

"And as I say, it is a mockery of our of our legislation in modern slavery, which is important legislation."

He added: "But what this person has done doesn't take that seriously, and that's why the Home Secretary is so determined to take this head on and make sure these deportations can go ahead.

"We'll be fighting this every step of the way because we want these deportations to go ahead imminently."