Enough hilarity, we got as far as unwrapping it today... I was concerned that the instructions might get wet with all the rain... silly me! They were in a sealed plastic envelope in the middle of all the wooden parts, which were shrinkwrapped and then wrapped in two layers of bubbles wrap then another layer of shrinkwrap... no amount of rain would have got to them. The reason we haven't done more is that Lawrence has hurt his back again , and today's been the first dry day for weeks.
BTW - I carefully kept all the bubblewrap... 'cos I know someone who will have the greatest fun with it when she next visits... and she'd better bring the video camera, so I can record the event.