This the ignition lock from 9049 compared to a Ford era unit, and a shot of the plastic covers as modified to accommodate it's larger size and different column mounting angle. The turn signal switch is a Ford era item.
Simon, do you have an example of a later car with the Innocenti lock?
Are the plastic cover pieces modified like these were?
Interesting that 129 cars later, Julians 9178 uses all Ford era parts.
Back to the slop problem, someone tried to stuff a (presumably) Ford era bushing into the bottom of the column. It will not seat properly because of a step in the steering shaft diameter. I think a spin on the lathe to open it up to match the step will resolve the problem.