An Edgware Road shisha caf� has had its alcohol licence revoked after a member of staff allegedly head-butted a customer.

The incident at Room One caf� on December 3 left a man with a serious head injury and cuts above his eye which required several stitches.

Police say evidence shows a member of staff head-butted the victim when he attempted to leave the premises to smoke a cigarette.

It is alleged four other members of staff then further assaulted the victim.

Police say the man was invited to leave by the rear exit where a taxi was waiting.

But officers say the victim was then locked out of the premises and left to make his own way to hospital, where police were called.

A Westminster Council licensing committee initially suspended the licence before fully revoking it last Friday.

A report to the committee stated the caf� had a history of violence, disorder and non-compliance at the premises.

In May 2010 customers also suffered carbon monoxide poisoning and were taken to hospital after smoking shishas inside the premises.