Well, I put everything back together today, quietly and slowly so as to surprise BRP!
Finally when it was all back in place, the big moment came - turn the key and ....... no joy.
The engine sounds like it's firing but not at the right place so there's probably something wrong with the timing - oh good! I thought I'd try swapping plug leads around but having pulled the number 1 it came apart as can be seen in the photo.
Time to call a day I decided, after all, I can't drive until November at the earliest!