Preston murderer Thomas Parkinson on the run from HMP Kirkham

Police have warned people not to approach Thomas Parkinson

A murderer who fled an open prison in Lancashire more than a week ago is still on the run, police have revealed.

Thomas Parkinson had been serving the final two years of a life sentence when he went missing from HMP Kirkham on 24 April.

The 31-year-old was convicted as a teenager in 2007 after stabbing Shaun Higgins, 23, at a house party in Preston.

Lancashire Police have only just made news of his disappearance public.

When asked by the BBC to explain the delay, a spokesman said the force's decision to use public appeals "has to be considered in terms of being relevant, proportionate and necessary".

Fylde MP Mark Menzies said the delay was "incredibly concerning" and has written to Ch Con Andy Rhodes and prison governor Derek Harrison "to seek answers".

"I understand, at times, it's best for police not to go public when they have intelligence which may lead to a swift arrest, but given the nature of Parkinson's crimes and the recent warnings that he should not be approached if seen, it would seem that this information may be in the public interest," he said.

Police have warned the public not to approach Parkinson since he could be violent.

Formerly of Acacia Street in Preston, the 31-year-old is described as 5ft 7in tall, slim, and with brown hair and green eyes.

He has links to the Warrington, Widnes and Bolton areas.

A police spokesman urged Parkinson to "do the right thing and come forward".