Government ministers want to get tougher on immigration as study shows the true scale of Britain's border problems.
A Home Office report says an estimated 70 per cent of the 863,000 illegal migrants are living in London.
The study also reveals that 10,000 foreigners who had no legal right to live in Britain have been granted permission to stay under the so-called 14-year rule.
We are determined to get immigration under control, and in the past year net migration has fallen by a quarter. We also want to get tough on illegal immigration.'
The illegal population – more than three times the 275,000 who live in Newcastle – will add sharply to the number of foreign-born nationals living here legally.
Earlier this month, the official Census showed that 7.5million people who were born abroad were living here in 2011, of whom more than half have arrived since 2001.
