[woodcarver]

Hi Danny, I have not been back to the U.K. for about ten years ! With that proviso I can't say that England had any world class aquariums when I used to live there. There is a site that lists them all but is not too informative .
However I do believe the Aquarium hobby is very active and you may find it interesting to visit some retail establishments.
One place I used to go to when I started a marine aquarium in the sixties is :

Waterlife Research Industries Ltd.
Bath Road
Longford,
Middlesex. UB7 0ED
Great Britain

They are still going and have a large place near Heathrow airport.
If I find any more info will post accordingly.............

.....................Dave