Thanks Cityofsmokingjoe for both the e-mail and the link.
I have e-mailed the National Joint Registry to try and get their steer on this before making a final decision.
I would suggest that following the advice from the surgeon and the other replies I think this is becoming less unlikely.
I will post on here once I have clarification on what the name of the mechanism is that I have and whether anyone is running on said device.
Regards
Rob