Thanks for all the encouragement, although the references to caravans and the B&B arrangements have got me intrigued.
As for making chocolate with milk it can be done, apparently PADI do a course for those who want to learn more (go to
www.padi..... and click on PADI REFRESHMENT DIVER SPECIALITY for more info').
Luxembourg has flooded caves, hmmm... Now where did I put the TDI Cavern qual card?
Ant S