ive had a good poke around with hammer and screwdriver today
somone did some bodge work lol

filler foam covered with filler and underseal for rear o/s chassis leg to rear panel about 3 inch long (explains no tow eye)

o/s rear lower qtr rotten inside and out, outside skimmed with filler and stone chip to hide it

n/s inner rear lower qtr rot

both inner rear sills rotted
n/s outer rear sill rotten

small repairs need to chassis around spring cup area
so not the end of the world really