Many thanks for the advice.

I replaced the ignition switch and the starter issue was resolved.

However, I couldn't start the car straight away as the start just clicked....... as if the battery was dead.

I found what looked like an earth lead which attaches to the firewall. The stud was loose so I gave it a wiggle and the car started.

I think this is not actually a grounding point but a positive for the stater. I could be wrong.

I will need to somehow tighten the stud eventually..... however not sure how to gain access to the underneath.

Anyway, back on the road and it's a pleasure to drive.

Cheers.