Prince Street - Sawing of granite setts

Bristol City Council is looking for firms capable of sawing large quantities of traditional hand-hewn setts. The setts are currently either in store or in situ in historic areas of the city centre. They are nominally 200mm long x 100mm wide x 200mm deep. They are all slightly different sizes and shapes without any sawn, or otherwise flat faces. The great majority of the setts are granite from different locations around the world (brought to Bristol as ships? ballast) and some of them are extremely hard. Some setts are thought to be sandstone, limestone or other unidentified metamorphic or igneous rock types.