Hi Vincent. I don't know if it can be made elsewhere but suspect it is. This article from Wiki says that crumbly is more suitable for mass production.

"Lancashire is an English cow's-milk cheese from the county of Lancashire. There are three distinct varieties of Lancashire cheese. Young Creamy Lancashire and mature Tasty Lancashire are produced by a traditional method, whereas Crumbly Lancashire (more commonly known as Lancashire Crumbly within Lancashire) is a more recent creation suitable for mass production."

I picked up this from the same article -

"It is traditionally paired with Eccles cakes[citation needed] and Chorley cakes."

Now I want to try it with Chorley cakes! Or Charlie cakes as the Mrs calls them :-S With Eccles cakes though? Nah. Too sugary.