Police want to speak to this man, who they believe may have information relating to an assault on a crowded bus which left a disabled mother unconscious.

The woman, who suffers from the autoimmune disease lupus, and her 32-year-old husband were attacked on the number 85 bus at about 2pm on Sunday, September 19.

Both were kicked and punched in the head and stomach during the attack, with the woman taken to hospital by ambulance with internal bleeding.

At the time the assaulted man, who asked not to be identified for fear of reprisals, said his wife's head was slammed repeatedly on the floor while she was being kicked.

The couple boarded the bus at Eden Street, Kingston, and said the assault took place as it passed Kingston University near the junction of Kingston Vale and Woodview Close.

Police have re-issued an appeal for someone they would like to speak to, who is about 5ft 10in, aged about 35, with short afro-Caribbean hair.

He wore a puffer jacket with a white logo on the left breast area, dark trousers and was seen with a Blackberry.

He got off the bus and headed towards Roehampton.

Anyone with information should call D Con Dave Norman at Kingston police on 0208 247 4946 or Crimestoppers anonymously on 0800 555 111.