Cheers - i figured it had to be the lever, so i called at local ECP o way hoem, picked up a new one for £20.
After 20 minutes studying the diagrams on the workshop CD, I went at it - took 30 minutes top to..
disconnect battery
remove airbag (held on by 2 5mm hex headed bolts from the rear)
disconnect airbag (prised off yellow connector on back of unit with small flat screwdriver)
Removed steering wheel (24mm locking nut) - being carfeul not to disturb any airbag calibration ring on the rear.
Undid the 3 slotted screws holding in the stalks - positioned at 10, 1 and 7 o'clock
disconnected the four electric connections to the two column stalks
slid off the two stalks
slid on the new wiper stalk, then the old indicator stalk
refitted reverse of removal.
Fired up ignition - Airbag light check went as normal
