Lee - in the Blower book:
"Remove the clamping nut from the telescopic adjustment clamp and extract the clamp and bolt. This will allow the wheel to be withdrawn to its fullest extent and enable the plated helical sleeve to be contracted so that the key at the upper end of the column, which engages with the keyway in the splined adjustable shaft, may be withdrawn.
This will release the steering wheel and telescopic assembly, which can be removed for further dismantling if necessary."
There's a drawing showing some of this. Let me know if you need the drawing also.
Tom M.