car continues to run with the Key out!

OK, this one is puzzling. I've spent the afternoon trying to find why my sting is doing this.

So at present box standard engine, 1.2 carb, mechanical fed fuel pump.
Took it out last night, got home and shut off fine with the key, moved it this morning and it refused to turn off on the key.
Dropped off the switch to see if the key wasn't turning it off, switch seems fine. Started it and then pulled off the connections, expecting it to stop... it didn't!
So I expect it to be a relay or something like that some where but have no ideas now....

Anyone had an issue like this before?

OK, it's sorted now. Due to a track on the clocks touching another one. Found it be chance.

Splendid diagnostic skills sir.

Had that on my sr years back.