The murder of a gay retired BBC executive was reconstructed on the BBC One Crimewatch programme last night in a bid to bring the killer to justice.

Hallam Tennyson, the 85 year-old great-grandson of Victorian Poet Laureate Alfred, Lord Tennyson, was discovered in his flat in Highgate, north London on December 21 2005.

Mr Tennyson, who was gay had suffered serious head injuries, and had several stab wounds. He was pronounced dead at the scene. His body was discovered by his former partner with whom he shared a flat.

Mr Tennyson went to Great Portland Street tube station at 4.05pm on the day of his death, he was later photographed by CCTV cameras at Angel tube station.

Commenting on the reconstruction, Detective Chief Inspector Tony Nash said: ‘We hope that our latest appeal and the reconstruction will encourage anyone with information to come forward.

‘It is essential that we build a picture of Mr Tennyson’s last movements and we are still keen to trace anyone who may have spoken to him before he was murdered.

‘This was a brutal attack on an elderly and vulnerable man. Despite his years Mr Tennyson was a lively individual who continued to lead a full and active life.”

A 44-year-old male who was initially arrested in connection with the murder was later released without charge.

Those with any information are urged to telephone the incident room on 020 8358 0300, or speak to Crimestoppers anonymously on 0800 555111.