Here are some links to useful websites.
Aberdeen Diving Services Aberdeen based equipment servicing and repair
Aberdeen Drysuit Repairs Aberdeen based drysuit servicing and repair service
Octopus Test Systems (Stonehaven) Cylinder testing and filling service
North-East Dive Dive Dive Charter and Dive Expedition Specialists, based in Kinlochbervie
Buchan Divers Peterhead based group, tracing, identifying and diving local shipwrecks
Dive Stay (Eyemouth) Hard-boat operator on Berwickshire coast.
UK Tides Access a full year of tides for all UK ports