Police are appealing for witnesses after a female motorbiker was airlifted to hospital with serious injuries following a collision on the A47.

The female, who was riding a green Triumph Thruxton, was taken to Addenbrooke's Hospital, Cambridge, after the incident - which occurred at around 5.30pm yesterday on the westbound carriageway at Postwick near Norwich.

A spokesman for Norfolk Police confirmed that two vehicles had been involved: The bike and a silver Vauxhall Astra.

The driver of the Vauxhall was discharged at the scene, the spokesman said, and police officers closed the westbound carriageway.

Both East of England Ambulance and East Anglian Air Ambulance gave treatment, with the latter's doctors requesting that the eastbound carrigeway should also be closed.

A spokesman for East of England Ambulance said: 'An ambulance, a rapid response vehicle, and two ambulance officers attended and treated a woman with a serious head injury.

'She was flown to Addenbrookes Hospital for further care.'

That carriageway reopened at around 6.30pm while the westbound remained closed until around 8.30pm.

The incident caused long queues and tailbacks on the A47, with many Norwich City fans caught up in the traffic - leading to late arrivals to the Canaries' match with Wigan Athletic last night.

Investigation officers are keen to speak to anyone who witnessed the incident or saw the two vehicles leading up to the incident.

Witnesses should call 101 and ask to talk to PC Lodge at Acle Road Policing Unit.