The amount of Cheddar consumed in this country must dwarf all the other types put together. As prevalent as other British or foreign cheeses are, there is no way they are consumed on a regular basis by most people who will have Cheddar in most instances, whether a block or grated. It's cheap and cheerful, and crucially, affordable by all.
We bought some Mrs Kirkham's Lancashire recently from the farm, and they make as much cheese as their cows produce milk for - a couple hundred kg a day. There are fewer than 10 farms making Lancashire cheese. That's b****r all.