Immigration lawyer Andrew Tingley says that new rules requiring foreign nationals from outside the EU to have a biometric residents permit had left the IT system unable to cope.
It was close to collapse a few weeks ago. It has now collapsed. It's an absolute mess
More top news
A man shot dead by police after allegedly threatening people with a gun in a block of flats in Enfield has been identified.
Nigel Farage said Ukip's campaign would be separate from two existing No campaigns ahead of the 2017 referendum.
Murder charges against an Irish nanny, who spent more than two years in prison accused of killing a baby in the USA, have been dropped.