It's probably a UK issue. Same with Marshall. The prices in UK are SO MUCH lower than anywhere else. With internet and easy price comparison, this kind of anti free trade retail strategy is not working anymore, as continental clients order from UK (I did for Celestions and Marshalls in the past).
I guess they adjust the UK prices a bit up and the continental prices stay the same.
Still a big difference, e.g. a Gold costs 175 GBP at Hotrox (=196 EUR) but in TAD it costs: 349 EUR. That is still almost 80% more!!