OS Map App

#1
On a rather work related topic, is there an App I can get for the new ipad that will allow me to download OS Maps and access them offline whenever required, without being ripped off (as the only one I've seen has each download sheet available for almost the same price as a hard copy!)?
 
#4
I've got Memory Map on my PC, works well with my Garmin GPS. Sadly they are all pretty expensive for extra mapping. The Garmin came with OS mapping of the whole UK at 1:50k but again, not a cheap bit of kit. Memory Map do have an App, not used it I'm afraid.