I'm not sure how to use this forum exactly, so sorry if this should not be here, but I have found that the UK server chat has merged with my public/room chat.
There is no UK tab at the side and all of the UK messages appear in my room chat. I have been in my own room and on a different server to the conversations that are taking place.
How did I know it was the UK chat?
I messaged the people who's messages I could read and they told me to tell them what they were saying, they were then able to confirm that it happened in the UK chat.

I saw messages from a specific room and I was in an friend's Utility I asked people but no one knew also 2 of my friends also had that Bug/Glitch.

I think you can just put the UK chat in a tab again by typing /chat UK.