Mentioned this in a PM but might as well mention it here too just in case anyone else goes to visit the U.K.
London has a public aquarium. It's right next to the Westminster bridge, the bridge that's right next to the Parliament buildings. I once fancied myself a photo geek and one of my favourite photo posters is a picture taken by Thurston Hopkins, entitled "Lovers of London", from in the 50's, of a young couple, looking over the Thames next to this bridge, with the Parliament buildings and Big Ben in the background.
Anyhow the aquarium is just on the other side of this bridge (same side of the river). Here's a website with more info:
http://www.urbanpath.com/london/tour...n-aquarium.htm
Edit - guess I could link to the actual aquarium page while I'm at it -
http://www.londonaquarium.co.uk/
It's been a while since I was there but I was already into reefing when I was there and I remember it being pretty good. Its focus is mostly Atlantic stuff (and tropical Atlantic) whereas a lot of aquariums closer to us here tend to focus on the Pacific, so it offers some neat things to see IMHO.
