So I started by cleaning up some more chrome and glass whilst my wife was working, which again came up really nicely.
Later on I gave myself 1 hour in the workshop to finally get the dashboard removed which required me to get the heater cable, speedo, rev counter and indicators off.
I then found something odd. Earlier in the week I noticed that connected to the dashboard where two switches labeled 'Starter' and 'Choke'. Both were pull switches. I wanted to trace the wires to see what they were connected to, but unfortunately they were only connected to each other and nothing else, any ideas?
If I had to guess it was at some point a early immobiliser that required both switches to be pulled before the car could be started.