The sister of a man murdered in a suspected homophobic attack two years ago has made a renewed appeal for help in catching his killer.- Detectives investigating the murder of 57-year-old Geoffrey Windsor say they are keen to build up a picture of his life and are offering a £20,000 reward for information leading to a conviction.

Mr Windsor, from South Norwood Hill, was beaten to death almost two years ago.

His body was found by a member of the public at 1.52am on June 26, 2002, in Beaulieu Heights Park, South Norwood, a gay cruising area.

Despite repeated police appeals, including the BBC's Crimewatch programme, no one has been arrested or charged. The only clues the police have is a 14-carat white and yellow gold ring with diamonds found at the scene.

Mr Windsor's sister, who does not want to be identified, said: "Geoffrey's death was a huge shock. It was such a bolt from the blue. We met regularly and had planned to do so the weekend after he actually died.

"My brother was very intelligent and extremely talented at many things. He was musical, knowledgeable about plants and gardening and he was a real railway buff.

"His death is a huge loss, not just for me and our younger brother, but all our family."

Detective Chief Inspector Nick Scola, of the Metropolitan Police's serious crime directive, said the 57-year-old was beaten with a car aerial with such force that it snapped.

D Chief Insp Scola, who is heading the murder investigation, appealed for anyone who may recognise the ring, or have any information about the attack to come forward.

He said: "It was a vicious attack and I really do need anyone who has any information, no matter how insignificant they may think it is, to contact me. To help people remember where they were on June 26 two years ago, I would remind them that Mr Windsor was murdered on the day of the World Cup semi-finals."

Anyone with information should call the incident room on 020 8721 4111, or Crimestoppers to remain anonymous on 0800 555 111.