I went out to AJK yesterday, very impressed with their premises and setup so thanks for the recommendations. They put the car up on the ramp and showed me the various bits that were gone. I'm in need of a new rear bumper, lower bumper, rear fibreglass carrier that the bumper attaches to, rear panel that's all bet up. They recommend a pull on the floor with a new sound damping pad. I asked about a new floor (I was going to get them to do the subframe work on my own money) but they said because of all the other work required if they put in a new floor they're very confident I'll be looking at a write off., I'm already into €3k+ and a new floor will put it to ~€5k.

Carcraft on the way back pretty much said the same thing but added that there's no strength in the boot floor, it's all in the chassis legs and rear panels.

Eugh, the hassle of this.