Top Chef To Spice Up Edinburgh's Financial Hub   ONE of Edinburgh's best-known chefs has unveiled plans to move his restaurant to the heart of the city's financial district. Tony Singh is to relocate his award-winning Indian restaurant Roti to a site just off Morrison Street, near the Edinburgh International Conference Centre. The new restaurant, which is due to open on July 27, is more than double the size of the current Roti on Rose Street North Lane, and will also feature a wine bar. Mr Singh will also be introducing a new tapas-style menu, which will see diners being served their meals in "tiffin" boxes - the stackable, metal tins used on the sub-continent to keep food hot. Mr Singh said: "The relocation and expansion of Roti is a landmark in our business growth strategy. The existing site was perfect when Roti was born, but now it has established itself as one of Edinburgh's finest restaurants, it's time to move onwards and upwards. "Whilst Roti currently offers a quiet, oasis-like location, in order for us to meet the consistently high demand, we're relocating to a more prominent, visible location." The existing Roti will close on July 21 to make way for the new venture.