Detectives investigating the murder of a football coach executed by an assassin in front of his two friends are offering £20,000 for information leading to a conviction.

Ryan Musgrove, 36, died after he was shot by a masked assassin in a park in West Wickham in July 2009.

The gunman opened fire on the father-of-two after leaping from the bushes with a handgun.

The suspect, described as a slim white man wearing dark clothing, possibly a balaclava, a cycling helmet, goggles or sunglasses and a face mask, returned to the hedgegrow and fled on a black mountain bike in the direction of New Addington.

Police said Mr Musgrove, coach of Coney Hall Football Club, was specifically targeted in the attack, and his killer was aware of his movements and knew where he would be most vulnerable.

The gun used was a Luger P8, a World War Two German issue firearm which nowadays is an unusual weapon and very distinctive in style.

Leading the investigation Detective Chief Inspector John MacFarlane said: "Ryan drove to the playing fields and arrived at around 6.35pm to organise football training with Coney Hall FC.

"The team had only recently started using Sparrow Den playing fields as a training venue.

"Ryan parked his silver VW Golf and with a companion walked to the playing fields and met another member of the football team.

"As they were talking a man appeared from a nearby hedge, dropping his bicycle to the ground and walked up to the men.

"He then shot Ryan three times and fled on the bike across the adjacent field in the direction of New Addington.

"Through our investigations we have established that Ryan led a compartmentalised lifestyle which included connections to organised cannabis farming and to criminals for which he enforced drug debts.

"We believe this was a planned and targeted attack on Ryan. We also believe his killer was aware of his movements and had visited the location prior to the murder on a reconnaissance mission."

Those with information should call the incident room on 020 8721 4205; if you wish to remain anonymous please call Crimestoppers on 0800 555 111.