These tile cutters will be in Lidl from Thursday (04/07/13) for £14.99, seems a good price.
Product Information :-
Suitable for cross and diagonal cuts
With a rubberised surface area, flexible cutter and integrated snap head for clean splitting
Try-square adjustable from (°): 0 - 45
Tile thickness max. approx. (mm): 12
Cutting length max. approx. (mm): 400