Some more progress. Tail light panel removed, fibreglass layer inside the boot revealed a few horrors, as did the painted over gaffer tape on the underside boot floor.....
New section made and fitted to the left rear, and a new strengthening plate for the upright will need to be made as the base was rusted away. The replacement uncut panel will then be grafted in, plus the rear lower quarter repair sections. Bit of work, but, it has not been smashed so its old straight rusty bits swapped for new straight non rusty bits