The Independent Chief Inspector of Borders and Immigration, John Vine, has told Daybreak that the UK has a backlog of around 40,000 asylum cases which need to be addressed.
He said: "The Police National Computer was used by the [Border] Agency to find people of high harm, but was it wasn't used for was to try and trace and locate these people and that was the whole purpose of the exercise."
He added: "Remember way back in 2006, the then Home Secretary said all this backlog of cases needed to be completed by the summer of 2011, and here we are two years later and we still have a huge backlog of cases."
More top news
Clarke Carlisle "thinks about and prays for" the lorry driver he jumped in front of last year when he attempted to take his own life
The number of veterans seeking help for post traumatic stress disorder (PTSD) has risen by more than a quarter over the last year.
Plaid Cymru will today launch its election manifesto in Bangor ahead of the general election.