You do make my point for me Martin, I'm trying to rationalise with all my bikes having the same pattern. As anno domini increases so does my inability to swap seamlessly. It wasn't a problem when I was in my 20s and hopping from bike to bike frequently!
Just another pic showing all 3 bikes.

Yes indeed Ian.
I've been out this afternoon on my Interceptor and done another 20 miles without a recurrence of the electrical issues.
The new fuel tap arrived for the Crusader from Hitchcock's today and it's been fitted but not yet tested.
I think you could usefully add an Enfield to the stable bearing in mind where you now reside!
By the way I'm still going through those boxes of classic bike mags you donated. Happy to pass the first box on to anyone interested but they will have to be picked up due to the weight.
Hopefully pics of the bikes will appear....