Two prisoners are still at large after being mistakenly released last year, it has emerged.Another two, who are understood to have been freed in error in June this year, also remain missing.It comes as ministers face mounting pressure over a series of high-profile manhunts, with Justice Secretary David Lammy admitting on Friday there is a "mountain to climb" to tackle the crisis in the prisons system.

Two prisoners are still at large after being mistakenly released last year, it has emerged.Another two, who are understood to have been freed in error in June this year, also remain missing.It comes as ministers face mounting pressure over a series of high-profile manhunts, with Justice Secretary David Lammy admitting on Friday there is a "mountain to climb" to tackle the crisis in the prisons system.