Dog has chewed them, they need replacing.

 

I've got the seats out for a related reason (need cleaning because of dog), so figured now would be a good time to change them over. 

 

I haven't looked too closely at them at the minute, but removal would seem to entail removing the luggage cover support and the trim panel underneath. Other than that would appear to be only a few bolts.

 

Has anyone any advice on how to remove the two parts mentioned without breaking them?

I'll answer my own question.

 

Remove wheel arch trim (two plastic screw type things).

Remove support for luggage cover (two screws at the front and two at the back and one or two nuts in the middle).

Release the top of the boot side trim so you can pull it down far enough at the top to get a socket on the 17mm bolt on the inertia reel. There's a clip at the back, and a screw or two at the top - no need to take it all out.

 

Other than that fixing points for the seatbelt are obvious.