I have a Braun electric toothbrush that has the two pin British shaving connector. What is the best means to charge it in Europe, specifically Germany?
If you can't find a UK->EU adaptor that will take a shaver plug (as in the top answer), you could also use a combination of a standard UK shaver -> UK Type G adapter, then a UK to EU adapter. This is slightly less safe than using one single adapter, but much better than trying to force something into the wrong socket.
sometimes the "shaver socket" in Europe is slightly different than in UK (more narrow). Sometimes not. So it's a matter of luck.
If you want to use your toothbrush and the socket is different you can buy an extension cable and connect to a socket in the room with an adapter.
The safest way without a doubt is getting an EU charger. Same with laptop chargers -- just swap the IEC C7 AC cable ("figure eight") or IEC C5 ("mickey mouse) for a cable appropriate the local power socket. It doesn't get safer than that. Avoid plug converters whenever you can.