In reply to tizer:
It's unlikely, many places are cracking down on buying any old stuff on the C2W scheme, it really has to relate to "safety" (i.e. hi-viz clothing or tools for maintaining your bicycle).
Anyway, there are some good deals to be had on SatMaps that would be cheaper than the full price minus tax that is offered by the C2W, such as on Amazon or a discount code for an outdoor shop.
Post edited at 17:15