Thanks man, that's really useful info. This is new for me, so sometimes it is hard to tell what is 'broken' and what is 'it was just like that back then', if you get what I mean 😅
I've had the rear seats out and know exactly what you mean. The carpet doesn't extend far enough and even if it did, as you say, the seats do not sit down enough or tight enough to pinch it.
I'll have a good think about it the next time she is out of storage and see if I can come up with a solution. Thanks again for your input guys, you're stars!