In reply to MtnGeekUK:
The service for the new maps with scratch panel only started this month.
I bought some and downloaded the app and maps but couldn't get it to work on first trip in an area with no phone signal !
It now seems to work offline ok though so might have just been an initial glitch with phone app.
That said, the new maps app seems to perform better than the old tiles one now I have got it working.
The tiles are brilliant if you just need a small area though - if there is a signal just buy on the move works fine.
I contacted them since I also have a lot of tiles purchased which means using 2 apps. It seems they are going to amalgamate the two apps in the future - all part of ongoing development they say