Before anyone asks I've still not started the car to test the engine and don't think I will be doing for a while.... My thoughts are that its 50/50 whether the engine is damaged. Don't worry though folks, whatever state its in it will run again!
Yesterday I went to the garage to remove the bumper and flush the rad, which I did. 
After removing the bumper and getting a good look underneath the car it makes sense to do a few bits whilst the front is apart: 
Clean and re-paint the front subframe. 
I've got replacement springs/shocks to go on.
One brake caliper was seized, so both will be removed, stripped and cleaned.
Theres also a bit of fibreglassing that needs doing on the bumper/undertray.
This is where the car is taking up residence for now, at in my bro-in-laws garage, it will probably be there for a while... Unfortunately I only have Saturday mornings to work in the car and I don't really know what I'm doing, so progress will be slow 
 

1988 GTA Turbo .... 
1990 Scirocco Scala (1.9 TSR), 3x Daihatsu kei cars, 659cc turbo, 4wd.