A £10,000 reward is being offered for information leading to the arrest of a teenager wanted in connection with the murder of a man in Essex.

Bradley Blundell has evaded police since August last year when 34-year-old John Pordage from Galleywood was shot and killed outside a BP petrol station in Great Baddow, Chelmsford.

Mr Pordage was shot in the chest at 2am on Saturday, August 5.

Blundell, 18, who has links to Chelmsford and Great Baddow, is 5ft 11ins tall and of slim build.

Detectives are urgently trying to trace him in connection with the murder.

A reward for information which leads to his arrest has been doubled to £10,000.

Police believe he may have left the country.

A jury in the Chelmsford Crown Court found a second teenager not guilty of murdering Mr Pordage.

The 16-year-old, who cannot be named because of his age, was cleared by a majority decision.

Anyone with information on Blundell should call 999.