Businesses and public buildings tend to have air conditioning in and wonderful it is too (says he who's worked all day in a public library with the air conditioning running, only upset to have to step outside at 5:30 to a wall of heat and getting to a car that proudly boasted 35 degrees on the dashboard).
Portable air conditioners are easily available but the big industrial scale ones you see in American homes we just don't need them, not that size anyway as we live in more modest size homes, not those that make the QE2 look like a shoebox.
Anyway it wouldn't be Britain if we weren't complaining about the weather, too hot or cold...
Maybe you’ve seen some wrong ads, but the portable air conditioners for residential use are about the size of a two drawer filing cabinet. The one I have in my room is 28” high, 16” wide and 10” deep. They’re only normally rated for rooms up to 200sq ft.
Don’t let anyone treat you like you’re a VO/SOT when you’re a PKG.