I think maybe your idea and my idea of expensive are slightly different.
Even at 35 pounds.. that is just too expensive for my taste for a flame angel (Not that I would ever buy fish online, I will gladly pay a marked up price to a LFS for the ability to look at and observe the fish first). I wonder why the prices are so much higher there? Are there any special import laws/taxes there that they don't have here in the states that would raise the price? Reason I ask is because both the US and UK get their fish from the same place.. red sea, australia, fiji, marshall islands, etc.. so it would seem to me that flying fish out of those areas to either direction would cost about the same. So what is making it cost that much more in the UK? Maybe the Hawaiian fish (Potters) I could see being a little more there since it is very close to me, but far from you, but the rest I can't understand.
Can you post some recent prices from a LFS in your area just for comparisons sake? Normal fish.. like clownfish, gobies (yellow watchman), lawnmower blenny.. you know, the common fish most people start out with. I am just very curious now on how much prices change from different locations.