Awesome - sorted now!
When looking in the hole I could see a white plastic section that was blocking the way. It was evident that it moves from the steering wheel direction, to the bulk head direction. Not really sure what purpose it serves, but it wouldn't budge and was stopping the key from entry.
A small electrical screw driver, and a bit of GT85 soon cured it as it pinged back into hits home. Not sure if that ping was a "break" ping, or it just sitting home nicely ping!
Still, I can now start the car! Yeah!
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