Greetings Drazil,
Our guild, The Twilight Tier (Horde, Saurfang) is currently recruiting members after a time of inactivity. We’re welcoming anyone who is looking to join a friendly and drama-free community that they can call home.
Although I can’t say we’re a British guild, we have a couple of players living in England, and we all speak English as a native or secondary language. Most of us are on the Central European Timezone (+1 hour of that of the UK) and our active times are generally between 6 pm and 12 am Server Time and throughout weekends.
As for what we do, well currently we’re all waiting with excitement for the upcoming expansion. Several are levelling up alts, experiencing BfA for the first time or running dungeons with the guild (Normal, Heroic and Mythic). We’d like to look into raiding should our numbers allow it, but it’s not our priority.
If this sounds like a place you and your friend would like to look in to, feel free to send me a DM on Discord (Veletala#8483) or via Battle.net (Veletala#2216) and I’ll be more than happy to answer any questions 
Best of luck in your hunt for a guild!
~Veletala