How can I source full size CO2 Cylinders in the UK?

If there is a local homebrew club they will usually be able to let you know who supplies CO2 locally, but there are a few national companies who do such as Adams Gas and Air Liquide who have local stockists. They charge a deposit on a cylinder and you pay for refills, there is also BOC who we believe charge a rental for the cylinder.

Also you may find a local pub who are willing to add an additional cylinder to their order.