OK, home again.
The break down was easy, disconnect rear brake cable, unscrew X box, roll back cables from the J hooks and place rolled up cables in a plastic bag and tie to front section using garden ties ( same stuff as you use for freezer bags but is green and comes in a roll.) and unscrew couplers.
Re assembly was a little fiddly lining up the serrated edges of the tubes as another poster said but we found that if we left the back half firmly secured on our two bar bike "beak" it was not too bad with two adults holding the front bit. We removed the front wheel for the process thus leaving quite a light piece of bike to move around.
We did the re join twice, once when we arrived then we broke the bike down again for a drive to the next day's ride which was some distance from where we were staying.
We have not re assembled after getting home yet because we did a cylinder head gasket on our car and got a mate to bring the bike home for us and we have yet to reclaim it.
Mike