A Channel migrant has been deported for a second time under the “one in one out” scheme.
The Iranian migrant was first deported in September before returning to the UK on a small boat two weeks ago.
Shabana Mahmood, the Home Secretary, said he was flown back to France on Wednesday after being detained on his second arrival.
She said: “Anyone looking to return to the UK after being removed under the UK-France agreement is wasting their time and money.
“This individual was detected by biometrics and detained instantly. His case was expedited and now he has been removed again.
“My message is clear: if you try to return to the UK you will be sent back. I will do whatever it takes to scale up removals of illegal migrants and secure our borders.”
The unnamed Iranian was one of more than a dozen Channel migrants returned to France on a flight on Tuesday.
It brings the total so far deported to France under the one in, one out scheme to 94, with 57 asylum seekers having come to the UK from France under the reciprocal agreement.
The Iranian initially arrived in UK on a dinghy on Aug 6 and was deported on Sept 19. However, he left a migrant shelter in Paris, where he had been housed, headed back to the coast and arrived back in Britain on Saturday Oct 18.
He was held in an immigration detention centre after being identified on arrival by border officials.
Under the rules of the one in, one out scheme, it is understood that immigration officials had to re-run the entire deportation process for a second time before he could be removed.
This meant he had to be re-issued with a notice of intent to deport within seven days of his re-arrival in the UK, then provide removal directions and take account of any new modern slavery claims by him.
The Iranian was the third migrant to be removed under the scheme, after an Indian man on Sept 18 and an Eritrean on Sept 19.
On his return to the UK, he claimed to be a victim of modern slavery at the hands of smugglers in northern France.