Originally Posted by
FTLexMUC
You may get a better deal if you buy a ticket to Frankfurt or Brussels and then a separate ticket to London
Or the Eurostar fast train Brussels to London.
UK has the APD.
https://en.wikipedia.org/wiki/Air_Passenger_Duty Business class traveller
departing from most UK airports pay a far higher tax/duty. APD is not payable for arrivals or transits
Great Circle Mapper