Around Nottinghamshire and bits of Derbyshire, Mansfield bitter was the norm for many years and was a bit too sweet for most tastes. Most of the pubs I knew sold "mix." Half bitter half mild. Always pour the bitter first or get shouted at....

Conversely, if you go back enough years, the contents of the drip trays together with a few bottles of stout were poured into the mild barrel. Waste not, want not.....