I suggest you contact the Cambridgeshire Tile & Brick Co at Burwell (www.cambstileandbrick.co.uk). The company was set up by the Ely Preservation Trust to supply clay tiles suitable for re-roofing the historic buildings surrounding Ely cathedral, where it was considered that the proposed use of a modern product would be out of keeping with the original form of tile. The ‘modern’ tiles that were rejected were manufactured from orange-and red-burning clay covered with a dyed sand facing to simulate the light colour of traditional Cambridgeshire tiles.
All tiles from the Cambridgeshire Brick & Tile Co, on the other hand, are made using locally dug Gault clay that have been hand-moulded in the traditional way. They closely resemble the peg tiles used in the past in this corner of England, with characteristic variations in the colour of each piece resulting from subtle differences in the clay itself and the firing temperature in the kiln.