UK begins detaining migrants set to be deported to Rwanda

British authorities have started to detain migrants in preparation for them to be sent to Rwanda in the next nine to 11 weeks, the government said on Wednesday, laying the groundwork for Prime Minister Rishi Sunak’s flagship immigration policy.

A law to pave the way for sending asylum seekers to Rwanda if they arrived in Britain without permission was approved by parliament in April, and Sunak wants the first flights to take off in July.

More than 7,500 migrants have arrived in England...