Migrants arriving off Britain's south coast were being taken into detention ahead of their removal back to France under a new reciprocal cross-Channel treaty.

The UK has detained the first small-boat migrants under a “one in, one out” returns treaty with France, as pressure grows on Prime Minister Keir Starmer to stem the influx of asylum-seekers across the English Channel.

British border authorities have detained the first group of migrants under a pilot plan that will send some who cross the English Channel on small boats back to France