In reply to Only a hill:
> but it lets you download OS map tiles for free
It's likely that the OS will send the lawyers to pay tham a 'cease and desist' visit sometime soon.
OruxMaps (a one-man developer) used to be able to download OS map tiling from Bing, including hoovering up defined areas. Then the suits paid a visit. Bing must also have modified their tile server, because eventually even the old version of the app stopped being able to access Bing's OS mapping.
A great shame because I really like the app.