Right well we bit the bullet and saved her date then reset the phone. A bit of a pain setting it all back up they way she wants it (ongoing) but so far no sign of any adverts appearing. I've suggested she doesn't reload all the apps she had before in one go but to do it in stages then if the ads reappear we have a better idea which app is responsible. I've a feeling this was all linked in some way to an ad which popped up and she clicked on when she was using the Facebook app some weeks ago but we'll see.
Thanks for the help guys.
