Welcome to the forum Camelia.
Being that I'm in the states I can't directly help you, however I would like to point out a feature of our forum called "The Map" that may be of some service. You can find it at the top of any of the headings. Once you access it you can see the locations of other forum members, wineries, events, and what we call home brew stores which is sort of what you are asking about.
Currently there are only 2 of several members, 4 wineries, and 12 homebrew stores listed in the UK. Judging from the proximity of the stores to the members it wouldn't be too hard to figure who listed what and send a PM asking their opinion.
Should you decide to list yourself on the map and have any problems PM me and I can probably help. ( I understand there may be some sort of problem between the British Postal System and Google Maps but I think we have a workaround).