Nineteen people, many believed to be Iranian, have been discovered on three boats in UK waters.Read more
Kweku Adoboli, the former UBS trader convicted of fraud, was detained when he attended his weekly appointment earlier today.
His spokesperson said he had been transported to the Harmondsworth Immigration Removal Centre.
Adoboli has been fighting deportation to Ghana, where he was born and left at the age of four. He has lived in the UK since he was 12.
Foreign nationals sentenced to more than four years are automatically considered for deportation.
He was released from prison in 2015 after serving four years of a seven-year sentence for a £1.4bn fraud at Swiss bank UBS.