Hi Diablo,
Alas, after much further research you are correct. Apple, in its wisdom, has seen fit to foist an app on users without giving them the choice to opt out.
To be honest, a pretty sh*tty thing to do. I bought the phone for my use, not to be a guinea pig for Apple's gaming field tests. Clearly not everyone who owns an iPhone is a twenty-something who lives to play mindless games.
App has been duly shoved to the back of my screens and hopefully a future update will allow users to decide for themselves what they install or don't install on their phones.
Thanks for your help.