A Channel migrant deported to France has travelled back to the UK on a small boat.

Sir Keir Starmer’s one-in-one-out deal with Emmanuel Macron descended even further into farce after the failed asylum seeker made a mockery of Britain’s borders.

The migrant, who claims he was threatened at gunpoint and abused by people smugglers, fled a shelter in Paris because he was “afraid for my life” in the French capital.

He then crossed the Channel again in a small boat.

Home Office sources say the man is being held in an immigration detention centre and officials will try to “expedite” his deportation.

Tory leader Kemi Badenoch said: “Does that mean we now have to take two people from France to return him?

“This Labour Government is in total chaos – no backbone, no plan and too weak to take the tough decisions to secure our borders.”

Reform UK leader Nigel Farage said: “This shows Keir Starmer’s one in, one out policy is a total abject failure. Illegals are laughing at us.”

Shadow Home Secretary Chris Philp said: “The Government’s gimmick returns scheme is descending into farce.

“They can’t even ensure the handful of people they return to France actually stay there – and now this man has come back to the UK and is using a modern slavery claim to stay.

“Only 42 people have been returned to France over a time when over 10,000 have arrived.

“This is clearly no deterrent at all. We need to leave the ECHR to allow us remove all illegal immigrants within a week of arrival.

“But Labour is too weak to do that.”

Shadow Home Office minister Matt Vickers said: “This is a complete farce. We need to leave the ECHR and rapidly deport anyone who arrives illegally in Britain.”

The revelation will prompt renewed criticism of a scheme many believe will fail to deter Channel migrant crossings.

The asylum seeker, who has not been named, said: “If I had felt that France was safe for me I would never have returned to the UK.

“When we were returned to France we were taken to a shelter in Paris. I didn’t dare to go out because I was afraid for my life. The smugglers are very dangerous. They always carry weapons and knives. I fell into the trap of a human trafficking network in the forests of France before I crossed to the UK from France the first time.

“They took me like a worthless object, forced me to work, abused me, and threatened me with a gun and told me I would be killed if I made the slightest protest.

“Every day and every night I was filled with terror and stress. Every day I live in fear and anxiety, every loud noise, every shadow, every strange face scares me.

“When I reached UK the first time and Home Office asked what had happened to me I was crying and couldn’t speak about this because of shame.”

More than 11,000 migrants have reached Britain since the “one-in-one-out” scheme began on Aug 6.

Migrants sent back to France are housed in one of 3,000 state accommodation centres for asylum seekers.

But they are not detained, which means they are free to come and go.

France’s interior ministry denied that conditions for asylum seekers returned to France were difficult.

Analysis by the think tank Migration Watch on Tuesday slammed Sir Keir’s returns deal with France, warning only 42 people have been removed since August 6.

This is the equivalent of a return every two days. Given almost 60,000 migrants have arrived since Sir Keir took office, it would take until 2320 to remove every small boat arrival under Labour.

The Home Office has vowed to ramp up returns under Sir Keir’s deal with Emmanuel Macron.

Migration Watch Chairman Alp Mehmet: “This is not a legacy to look back on with pride, Prime Minister.

“Moreover, if we receive one migrant back for each one we return, we will have the same number, plus new arrivals, to fend for.

“The public have had enough of fibs and bluster, which the gangs lap up as they get smashed on champagne.”

A Home Office spokesperson said: “We will not accept any abuse of our borders, and we will do everything in our power to remove those without the legal right to be here.

“Individuals who are returned under the pilot and subsequently attempt to re-enter the UK illegally will be removed.”