howard h
I'm guessing you're also the type that would never consider flying to Charleroi, Hahn, Girona
Correct. I'd go by train (Eurostar mainly) to the first two, and fly to Barcelona and train it to wherever concerning Girona.
Train to the real Frankfurt from London on Eurostar/ICE takes 8 hours, with changes at Brussels and Köln. Not much of an alternative to flying to Hahn really.
Eurostar to Brussels from London works, though.