A well-known environment campaigner has been seriously injured by a hit and run driver in Birmingham.

Chris Crean, campaigner for West Midlands Friends of the Earth, was hit by a car while riding on his bike at about 10.40pm on Friday in Moseley.

The 46-year-old was cycling along the Alcester Road when he was struck by a silver Ford at the junction with Louise Lorne Road. The driver of the car then drove off.

Mr Crean was knocked unconscious by the impact and suffered head injuries, along with a broken shoulder and a chipped hip.

Mr Crean is a well known and vociferous campaigner on regional transport issues, and regularly lobbies for better investment in public transport. As part of his job he travels to Warwickshire, Shropshire and Staffordshire on his bike.

It is the first serious accident Mr Crean has had in 40 years of cycling, and friends said it was unlikely the collision would deter him from getting back on his bike.

Karen Leach, Mr Crean's partner and fellow member of Friends of the Earth, appealed for the driver of the car to contact the police.

"Please can the man who hit Chris show some humanity and get in touch with the police and any witnesses too," she said.

A spokeswoman for West Midlands Police appealed to anyone with information to call police at Belgrave Road on 0845 113 5000.