It's crazy to try to say what the British drink; the four nations drink different things:-

Northern Ireland drinks uisce beatha and Guiness and wine.

Scotland drinks uisge beatha and Guiness and Heavy and wine, and uses uisce beatha in the preparation of coffee (the Irish cleverly found that way of making uisce beatha palatable).

Wales drinks chwisgi, tablen, cwrw, alcohol-free beer and non-alcoholic wine.

England mostly drinks tea, execrable instant coffee, and the cheapest alcohol it can get its hands on, and what used to be called Kangaroo Valley Beer Disease is now endemic throughout the country, not just in London's Earls Court area. There are exceptions - some people drink decent stuff - but not many; and some people drink lots of over-priced sickly sweet Californian "dry" rosé wine (it's the sugar that kills them, not the alcohol).

I've never yet known anyone fall down from drinking too much Darjeeling tea, but I guess it could happen if people were mixing Jamaica Rum into it (yes, I've seen Englishmen drinking that mix).