Ministers have warned that illegal immigrants in the UK may have to be granted a general amnesty as the backlog of cases spirals out of control.
The number of outstanding immigration and asylum cases rose by 25,000 in three months and that number is getting added to on a daily basis, the Home Affairs Select Committee says.
More than 300,000 cases needed to be dealt with at the end of June, up 9 per cent over the previous three months.
But they added that clearing such a large backlog runs the risk that the proper checks on immigration status will not be carried out.
The committee’s report on the UK Border Agency (UKBA) said: “We are concerned that the closure of the controlled archives may result in a significant number of people being granted effective amnesty in the United Kingdom, irrespective of the merits of their case.”
Most of the increase in cases came from a rise of more than 24,000 missing migrants who have been refused permission to stay in the UK but whose whereabouts are unknown, referred to as the migration refusal pool.
Chairman of the select committee, Keith Vaz MP said: “There are now about the same number of cases awaiting resolution by UKBA as there are people living in Iceland.”
The outstanding cases also included the 95,000 in the so-called controlled archives, effectively the backlog of immigration and asylum cases, which the UKBA has pledged to close by the end of the year.
While many of the people in the backlog of cases will have already left the country, “we are not convinced that the agency’s limited checking regime will have picked up all of the applicants who remain in the country”, the MPs wrote in the report.
“For this reason we are concerned that the final checks made on these cases should be thorough and that they should not be rushed to meet an artificial deadline.”
The committee’s report also questioned the consequences for both the individual and the taxpayer if applicants whose cases are closed are then found in the UK.
“We are particularly interested to find out whether any such individuals would be offered an amnesty or if they would have to start their asylum or immigration application again,” the MPs said.
Mr Vaz said: “Senior management promised to clear the ‘controlled archive’ by 31 December and that will mean writing off 81,000 files, some of which have been shown to contain real people.
“They need to get a grip. Entering the world of the UKBA is like falling through the looking glass.
“The closer we look the more backlogs we find, their existence obscured by opaque names such as the ‘migration refusal pool’ and the ‘controlled archive’.”
“UKBA must adopt a transparent and robust approach to tackling this problem instead of creating new ways of camouflaging backlogs.”
Immigration Minister Mark Harper said that the report raised some legitimate concerns but that the department was taking robust action.
“Every day it gets harder to live illegally in the UK – we are tracking people down and taking action against them.
“We are restricting access to benefits, free healthcare and financial products, and businesses can be fined up to £10,000 for every illegal worker they employ.
We are winning more deportation cases in the courts, exceeding visa processing targets and have introduced interviews to test whether foreign students are genuine – all of which are praised in this report.”
A UK Border Agency spokeswoman added that there was “absolutely no question” of an amnesty for illegal immigrants.
“If any of these individuals come to light in the future, we will take action.”