Police are appealing for help in piecing together the circumstances leading up to a crash that left a motorcyclist seriously injured.

The collision happened in The Street, Redgrave, near Diss, at about 10.30am on Sunday, when a black and red Yamaha, travelling as part of a group of other motorcyclists, collided with a hedge.

The male rider, in his 50s, sustained serious internal injuries and was flown by air ambulance to Norfolk and Norwich Hospital, where he remains in a critical but stable condition.

Any witnesses are asked to contact the serious collision investigation team on 101 quoting reference CAD 148 of 06/09/15.