Thank you for your reply gouldc. It was very helpful and I do remember the lady saying something similar. I didn't listen to the explanation too carefully but it was along the lines you mention. I think she said that someone looking to insure a Golf on Third Party F&T cover is more likely to be a higher risk than someone who is looking for Fully Comp ( it's usually the younger drivers or those with convictions who insure Third Party).
As I said I was rather surprised that the Third Party F&T cover was so much more expensive than Fully Comp (£52). I'm certainly not complaining though. Years ago when I had two SP30s I was paying that a month! I learned to stick to the speed limit and it saved me a fortune.
I'm still a little miffed about paying for other people's accidents though. Why should those drivers who keep their noses clean be penalised? As it was I changed my insurer and found it was cheaper anyway so it all worked out well. Let's hope they sort the system out soon then.
Thanks again.