Work continues.
Decided the rear wheel to arch gap was too much and was not keen to fill that much with putty. So now have gone with 19" TE37s.
Then I gave the wheels some concave by heating in boiling water for 5 mins and then pushing the Centre with a rod.

This is the new rear wheel compared. I have the rear wheels 2mm offset and the front 1mm.
Before and after comparison. Top before.
Then the first coat of primer and minor flaws corrected. Surprisingly the rear hatch needs no extra filling or sanding.
Thanks for looking