Removing the steering wheel on a 410

[livermoreb]

Can anyone please advise how to remove the steering wheel from a 410?

I need to get at the wiring behind the dash but to do that requires the removal of the steering wheel. I have taken off the centre cover with the horn push expecting to find a nut that would release the wheel but there is nothing but a circlip. I have tried pulling the wheel but it is not moving at all.

There is a metal ring behind the wheel with 3 holes around the circumference. Is that holding the wheel on? I have tried to move it but had no success.

Any advice would be appreciated.