As you may know, the British Beer and Pub Association (BBPA) & Society of Independent Brewers (SIBA) maintain an informal container colour band registration scheme on behalf of UK brewers.
If you are a new brewery yet to order containers, please go to the database and search for available colours. If they don't come up with a brewery, then they have not been registered. This does not guarantee that no one is using them, but we can only go by those registered colours.
Please contact email@example.com to register your container colours, and notify us of previous owners if applicable