A prison which holds large numbers of high-risk inmates serving life sentences is "no longer safe enough", a report has found.

Inspectors said HMP Gartree in Leicestershire had declined from "safe and stable" to a prison which had "lost its way".

HM Inspectorate of Prisons put much of the blame on staff shortages and a changing prison population.

The Prison Service said increased staffing would drive improvements.

Gartree holds more than 700 inmates, all serving indeterminate - mostly life - sentences, most of who pose a "high risk of harm to others".

An inspection in November found a shift in prisoner population from those near the end of their basic tariff to those more recently sentenced.

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