With the hamerite on the steering shaft dry and the information I picked up from GBS during the week, I refitted the steering column. The key mistake I made was fitting the internal nylon bush (that fits on the shaft itself) back to front. It should be fitted from inside the car with the spring clip behind it. This way the rubber gromit and outer nylon bush have no opportunity to pop out.
I have left the final tightening of the nylocs to another day. Once the steering rack is in it's final position and the connecting rod secured, I am sure the position of the steering column will need adjusting. After reading the long thread on the RHoCar forum about reuse of nylocs, I though this a pragmatic approach.