Just read this thread and realised it’s a 3 months old!
Anyways to the OP, in case you re-read this, I’m pretty certain you are in breach of the OS Openspace T&C’s in that anything you develop using the free version of openspace should be available for free.
You may find (depending on sales of your app) some unhappyish customers as there are limits to the number of tiles that can be displayed in any 24hr period depending on usage (60,000 I think)
If you want to sell your app you should really be looking to upgrade to the OS Openspace pro version.
If you want I can put you in touch with the OS product manager, let me know – email in my profile.
To prop – I’d recommend using opensource mapping, something like you can see on talkytoaster or similar sites. If you go round ripping off OS data you potentially put other fellow mountain bikers, like me, jobs at risk.