This article is worth a read if you haven't seen it already
bbc.co.uk/news/uk-england-s...
My observations...
1. Fill in all applications as honestly as you are able and read the small print, otherwise if you claim it might be rejected.
2, So called 'premium' providers, like Axa in this case, are probably just as likely to decline a claim if they can find good reason just as much as the others.
3. According to the article one quarter of claims are rejected.