Sir Keir Starmer is suffering "further embarrassment" after a migrant deported to France under the "one in, one out" deal with France has returned to Britain.
Speaking to GB News, Home and Security Editor Mark White predicted the migrant could "come back again" if he is once again removed under the same scheme.
Uncovered the The Guardian, the small boat migrant from Iran was flown to France as part of the UK's deportation flights on September 18, but returned just a month later on the October 18.
The man has been detained again by the Home Office, and will be returned to France for a second time.
Keir Starmer has suffered further embarrassment with his migrant exchange deal as one migrant has returned to Britain
|PA / GB NEWS
Explaining the situation on GB News, Mark said: "There's no doubt that this is embarrassing.
"Many people actually predicted that there was nothing to stop someone who arrives across the Channel, who is part of this return, still being returned to France and then just being let loose, as the French will do."
He added: "They are not kept in immigration detention. When they arrive there, they are let loose, there's nothing to stop them coming back across the Channel."
As host Christopher Hope dubbed the man a "hokey-cokey migrant", Mark admitted: "That's a good way of putting it".
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The illegal migrant claimed he was a victim of modern slavery in northern France
Revealing details shared with him by a source close to the incident, Mark said: "This is a migrant, my sources have told me, and it was confirmed that this migrant was earmarked for deportation on the 6th of August, when he arrived across the Channel on that date.
"He is an Iranian national, he was sent back on the 18th of September, and then has returned back just a month later on the 18th of October. Now he's in detention again, and his process of being returned to France will be expedited."
Casting doubt on the ability of French authorities to detain the migrant properly, Mark concluded: "But are the French going to keep him in custody again? I doubt it.
"I mean, he could conceivably come back again."
Mark told GB News that the migrant 'could return again' under the laws of the exchange deal
|GB NEWS
The man hoping to claim asylum in the UK said he believed France was not safe for him and says he is a victim of modern slavery in northern France.
Home Office sources confirmed that one person sent to France under the UK-France treaty is now back in the UK.
In a statement, a Home Office spokesman said: "We will not accept any abuse of our borders. 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."