Names of Pc killers 'known'

Pc Mike Silcock, 30, was knocked down outside a pub in Heaton Mersey, Manchester, a year ago today. He was taken to hospital with a serious head injury but died a short time later.

A yellow BMW 3 Series coup was seen driving away from the scene after hitting him and was later found burnt out on a green at Heaton Moor Golf Club.

A 10,000 reward is available for anyone with information that leads to the conviction of those responsible.

Detectives are particularly appealing to a woman who rang police, providing vital information, but has since not replied to any police contact.

Others are known to hold vital information, police said.

Pc Silcock's father, Glynn, 54, a retired detective chief inspector, said: "For our son, a good and decent young man, to die a horrific death at the hands of cowardly criminals is disgraceful and unbearable.

"The names of those responsible are almost common knowledge in parts of south Manchester. We know there are people out there who can assist with essential evidence."

Four men, aged 29, 24, 21 and 19, were arrested on suspicion of murder and remain on police bail pending further inquiries.