Graff in London - Photo : Leon Neal

LONDON, Sept 5, 2009 (AFP) - A seventh man was charged Saturday 5 September in connection with what is believed to be Britain's biggest jewellery heist, worth 40 million pounds (47 million euros, 65 million dollars), police said.

Aman Kassaye, 24, was charged with conspiring with others to rob the Graff jewellery store in London on August 6, as well as attempted murder, unlawful imprisonment and use of a handgun with intent to resist arrest.

He will appear in court on Monday 7 September, a police statement said.

Six others have been charged with conspiracy to commit robbery, and two of them have also been charged with possessing a handgun. They are all in police custody and are due to appear in court on October 23.

A record reward of up to one million pounds has been offered to track those behind the robbery, which took place in broad daylight and saw 43 rings, bracelets, necklaces and watches stolen.

Two smartly-dressed men arrived in a black taxi, walked into the store and threatened staff with handguns before taking off with the jewellery.

Graff, which is known for its diamonds and has a celebrity clientele, was also targeted in 2003 in what until now was reportedly Britain's most expensive jewellery heist worth 23 million pounds.