I'm British and I only drink coffee, but I don't meet many other people who do. Gotta bear in mind that most people only drink either disgusting freeze-dried instant coffee, or posh boutique coffee from, at worst, Starbucks and, at best, a decent independent coffee place.

Watching Sorted Food (London based food channel on YouTube) it does seem that some Brits enjoy both or one over the other. The majority seem to drink just tea, the next group enjoys both but for different events, and the smallest group is coffee only.

For the middle group it's people who have coffee in the morning and tea at noon/afternoon.