Many Thanks Mike. Just checked out the service history on this one with Lexus, and everything seems above board. Though doesn't sound like the timing belt has been changed, so I'll bear that in mind.
main issues to check according to lexus being front suspension arms and rear callipers, which I've seen mentioned already on this forum.
They mentioned the extended warranty as well, so I think that might well be a good shout for peace of mind......especially for a dope like me who knows nothing about maintaining cars!
I had a 450h a couple of years ago for a while as a demo form toyota, and I thought it was great. hoping this 400h isn't too vastly different.