Divers Warehouse Good price, awesome service - these guys rock.
BSAC Forums Lots of info, chat, and easy flame wars
Finstrokes UK diving forum
Rubberman Dry suit latex seals fitted next day, super fast, good price, excellent job
The Shark Trust UK charity dedicated to promoting the study, management and conservation of sharks, skates and rays
Gas Diving - Tech diving site, lots of info with UK bias
Scuba Addict - UK Viz reports
Undersea Adventures Penzance- A favourite during Cornwall week
DAN - Divers Alert Network
Divernet - Diver Magazine Online
DIVE - Dive Magazine
UK Sea Temperatures - 2 wooly bears or one?
Inshore Weather Forecast - from the Met Office
Satelite View Of Europe - what Europe looked like about 2 hours ago from space
Mikes Dive Store - Reading store