Thank you for you're replies. I know I shouldn't get depressed over it but it actually feels like a nightmare! The boot was of a small car but spacious enough for the cake to fit in. It was because of the accident the cake fell. annabakescakes, I will definatley look in to making a contract like the one you mentioned. But at the moment I feel like I don't want to do this anymore , I put so much hardwork and effort in to the cake and it was all for nothing. What upsets me most is that no one would care how much effort you have put in to something, all they see is the end result and there is nothing you can do about it..
Was it too hot in there? Yes, the exact thing happened to me, but my air conditioner was on the fritz, making the cake too warm, but it this idiot hadn't pulled out in front of me, it would not have fallen. But since it was warm, it damaged it more than it would have if it were cooler. The supports collapsed, and the cake turned to mush!
I understand about not wanting to do it ever again, but if you change your mind, make sure that if you have to drive with it in the boot, freeze it for about an hour, or more, depending on size. Freezing it won't damage it, it just makes it so much sturdier! I have figured out that things warm faster than they cool, (duh, lol) so if you freeze it for an hour, you have about half an hour for it to stay chilled and secure. I have been freezing all my wedding cakes before I move them, since my 4 tier fell. It just makes me feel so much better to have a hard cake that doesn't move.
Just don't touch it, if it is getting condensation on it. It will dry to a proper finish, before the gusts arrive, but fingerprints will be there forever!