Spuddy
See Woo's is in Horn Lane, Charlton.. adjacent to the Blackwall Tunnel approach road. They also have a supermarket in London.
http://www.seewoo.com/stores.phpThey have large glass tanks and sell live lobsters, crabs, eels, small turbot, mirror carp and sometimes grass carp. My brother once bought a couple of mirror carp for his pond but had to try to explain to the guy why he wanted them. The guy just kept smiling and carried on looking for his cleaver..
Somebody overheard and the carp got a last minute reprieve.