The most daring con of the 90s:  A reformed con artist from Manchester has spoken about his double life as an international fraudster, and how he pulled off an elaborate multi million pound jewellery heist.  Saqib Mumtaz, 49, and his accomplices persuaded top-end Beverley Hills jewellers Bijan that the brother of the Sultan of Brunei was planning a lavish wedding and was in the market for precious stones