Apple knowledgebase article HT4946 "iTunes: About iOS backups"
iTunes will back up the following information
(long list here)
•App Store Application data including in-app purchases (except the Application itself, its tmp and Caches folder).
• Application settings, preferences, and data, including documents.
That may be the fault of the Ordnance Survey and of the Bible Society for writing the apps wrong
Given the above, quite possibly.