Ok, I've told them I've been staying there temporarily which is the truth - I'm only at my folks house until I can get a job in London and relocate there (I've been interviewing for jobs since before Christmas, which I have evidence of).
The only problem is whether their definition of "temporarily" matches my own. Gotta wait for the claims handling team to give me a call now.
It's making me feel sick though, I've still got over 2 years left on the personal loan I took out to pay for the bike / lessons / gear / insurance and there's no way I can afford a replacement bike if they don't pay out