Ok, the Milenco steering wheel lock turned up today.
Seems substantial but not overly heavy.
Fitment is quick and easy and the plus version I went for has protective pads to stop the leather marring and a storage bag.
For best results turn the wheel 90Deg to fit around one spoke. In reality the front wheel attitude is only just poking out from the wheel well.
There is no issue using the lock like this with the auto adjust select for the steering wheel. It clears all cockpit components when it moves up and down.
Once removed and place into the supplied bag the comes with the plus version it hangs conveniently from a bag hanging strap on the hook behind the passenger seat (I haven’t moved the seat to hang it, this was the seat position the missus prefers)
I went for the yellow version, it’s there as a deterrent not to blend into the background. Plus the yellow matches the 400 stitching

I got it from eBay at a penny under £80 incl shipping. Halfords say they stock it (£60) but not with the protective pads or convenient storage bag. I understand you can buy these items direct from the Milenco website
Conclusions
Good item, no guarantees tealeafs will be put off if it’s installed. However, with the Tracker, Guardian Mode, Double locking,soon to be fitted nextbase dash cam, house CCTV and a steering lock I have made all reasonable efforts to ensure my car is secure
The Stoplock Pro Elite is also a good unit but loose on the wheel (but still secure). At £20 cheaper it’s a good alternative but won’t stow behind the seat as easily as the Milenco
HTH
Russ