CCTV images of Hallam Tennyson, the great-grandson of poet Alfred Lord Tennyson, captured on the day of his murder have been released by police.

Detectives investigating the death of the 85-year-old have released images of him in two Tube stations he used on December 21, in an effort to trace further witnesses.

The images show Mr Tennyson as he entered Great Portland Street Tube station at 4.05pm and around 25 minutes later in Angel Tube station.

His body was discovered at 11.20pm, in his flat in Shepherds Hill, Highgate, by a friend. Police and paramedics found that Mr Tennyson had suffered serious head injuries and several stab wounds. He was pronounced dead at the scene.

A 44-year-old man was arrested in connection with the inquiry on December 29, but later released.

Detective Chief Inspector Tony Nash, who is investigating the murder, said: "We hope these images of Hallam Tennyson will jog the memories of any witnesses who are yet 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. We urge anyone with information to come forward as soon as possible."

Anyone with information is asked to call police on 020 8358 0300 or Crimestoppers, anonymously, on 0800 555 111.