Migrants who arrived in the UK after crossing the English Channel have been detained under the new “one in, one out” returns deal announced last month by Prime Minister Keir Starmer and his French counterpart Emmanuel Macron.

The first detentions came as people arrived in Dover on Wednesday, which was the first day the pilot scheme came into force.

Pictures showed the migrants wearing life jackets and disembarking from Border Force boats.

The Home Office said detentions began for those who arrived on Wednesday afternoon and they will be held in immigration removal centres until they are returned to France.

Home Secretary Yvette Cooper said: “Yesterday, under the terms of this groundbreaking new treaty, the first group of people to cross the Channel were detained after their arrival at

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