I was put off by The Metropolitan Police Service Computer Crime Unit saying you should go to your local police station. It made me worry that they would not take it seriously.
In addition:
I like the FBI route as you can do it all online.
Of course, the German suspect(s) possibly do fall under UK jurisdiction regarding the Blitz scam involving http://biltzbasic.tk/ as it was hosted through Malo Ni Advertising Limited, 16 Peel Road, Douglas, IM1 4LR.
In addition:
The international nature of the Internet means that any attempt to deal with Internet-related crime will always be complicated by questions of jurisdiction. Laws vary from country to country and UK police have no power to intervene directly against criminal material on computers in another country or against criminals operating in another country.
I like the FBI route as you can do it all online.
Of course, the German suspect(s) possibly do fall under UK jurisdiction regarding the Blitz scam involving http://biltzbasic.tk/ as it was hosted through Malo Ni Advertising Limited, 16 Peel Road, Douglas, IM1 4LR.