The mum of a murdered Mitcham woman is appealing again for information to help catch her daughter's killers.

Sabina Rizvi was killed in the early hours of March 20, 2003, after being shot dead by a gunman who has still not been caught.

Sabina's mum, Iffat Rizvi, will be handing out posters next Friday at the Broadway Shopping Centre in Bexley in a new appeal for information.

Sabina, 25, died when the blue metallic Nissan Bluebird she was driving was ambushed in Watling Street, Bexleyheath.

She had been shot in the leg, arm and throat before the car crashed into a building. She was pronounced dead at the scene.

Also in the car was her boyfriend Mark Williams, 28, a self-confessed drug dealer of Waterhead Close, Erith.

Despite being shot twice in the head, Williams survived the attack.

The couple had just left nearby Bexleyheath police station where they had been interviewed about the disputed ownership of an Audi TT sports car.

The shooting was said to be a revenge killing, masterminded by Thamesmead man Paul Asbury, then 21, who claimed the £20,000 Audi car belonged to him.

Asbury, a rival drug dealer who was convicted of Sabina's murder and the attempted murder of Williams at the Old Bailey in November 2004, claimed Williams had stolen the car from him.

At the trial Williams admitted to being part of a gang called the Twenty-eights who targeted rival dealers.

After the theft there was a series of phone calls between him and Asbury.

CCTV footage and mobile phone records put Asbury at the scene of the shooting, but police do not believe he pulled the trigger.

Asbury was jailed for life in 2004 and told he would serve a minimum of 20 years.

Last year detectives offered a £20,000 reward for information leading to the arrest and conviction of those responsible.

From next Monday officers in Bexley will be making house-to-house enquiries in the borough in the hope of encouraging people with information to come forward.