Hi!
I prefer not to make postshipping because I had very bad experience with that from France and in my town, where only the national post is here, no UPS and so on, but I can go to Lille or to Calais, at the Eurostar station, to give the fishes. It will be very expensive for you for a few fishes and it is perhaps better to organize that from for Germany for a big lot of fishes and many people.
You must also take account – not to harm you -of the british paranoia with living beings imports. I don’t know if they let you bring them back with the train, and you will have to pass controls like in an airport. This frontier is the worst I know in Europe since the east-wall is down. Perhaps have other people experience with that. The ornaticauda have found a good aquarist in France.
Stay in touch about that.