Britain’s biggest jewellery robbery saw £40 million worth of diamonds stolen from Graff Diamonds in Mayfair. In total 43 bracelets, necklaces, rings and watches were stolen in less than two minutes.

Det Supt Stuart Cundy, of Scotland Yard, said that he was keeping an "open mind" about the robbery and had considered that the diamonds may have been stolen to order or that the criminals were helped by an insider. Det Insp Jason Prins added: “The items that were stolen will be very difficult to sell on the open market so I think there was already a market in place.”

The suspects, dressed smartly in suits, were dropped off at Graff Diamonds in central London in a black cab last Thursday afternoon and walked straight past a security guard. It is thought that they had made an appointment to visit the store using a false name. The suspects’ images have been circulated to all ports and airports but police believe they will have organised an escape route and may already have left the country.

A former head of the Flying Squad, told The Telegraph: “It has all the hallmarks of a well-executed, well-planned raid. Because of the specific nature of the articles they went for I think there would have to have been insider knowledge involved and good reconnaissance prior to the raid.”

This story shows you how easy it is to steal from a high end jewellery store, perhaps another reason why it is more secure to buy your jewellery online. Here at Coolrocks we offer a collection of diamond rings, for you to order safely and securely at your leisure. For more details please visit the website.