Hi,
Thanks for responding. Well I would assume that the other driver will be claiming that I didn't stop (which I didn't, given that I wasn't driving at the time, so couldn't stop

).
Descriptions is definitely an angle I'll be working. The point where the incident is claimed to have happened is basically at a junction (the side road attached to my driveway) which leads straight to another junction (with a busy main road), so there's no way I could have "sped off".
I am certainly denying it (because it didn't happen).
No one else has access to my vehicle (well, I probably left the keys in my room, so in theory my landlord could have "borrowed" the vehicle while I was out, being the only other person with a key to my room).
Having never made or received a claim before, I'm not sure what the entire process is. There seems to be plenty of advice from insurers on making a claim but none on defending yourself against one.