I'm not sure which bit you didn't understand.¿Que?There is one other possible approach. I know of someone who did this. You have to do this via notification to the LABC, as the normal electrician schemes don't allow it. You find an electrician who is experienced in installing in Germany, and (after agreeing it with LABC), do the entire bathroom installation to VDE100. As this is a european standard there is no good reason for LABC to refuse, (though if they do it's more trouble than its worth to argue).
Anyway, then you can fit a number of schuko sockets in your bathroom perfectly legally. You'd need a few german plugs to go in the sockets, but you can pick them up in any Baumarkt, next time you're in Germany.
As you have so often said yourself, Part P says (roughly):
A way of satisfying the fundermental principles would be to follow:
a. ....BS7671....or an equivalent standard approved by a member of the EEA...
All the person in question did was to exactly that by wiring his bathroom to VDE100. It helped that he was qualified to do installation in Germany and had a full set of VDE100 books. He submitted certification in german, which was accepted by the BCO, who declined an english translation.
So he has a set of legal sockets in his bathroom (rcd protected) to make his german visitors feel at home.
As another point of fact, the typical german bathroom has 2 or 3 mains sockets arranged conveniently round the basin. I am not aware of a higher death rate in german bathrooms.
Clearly the average DIYer should not attempt this. The circumstances where this was possible were very specialised, and not likely to apply to most people.