It’s not just Blackpool you know:
Widespread in the Craven Basin, including the Lancaster, Garstang, Settle, Clitheroe and Harrogate districts, south Cumbria and the Isle of Man; also in North Wales, Staffordshire and the East Midlands.
It is, to use a technical term, friggin’ huge mate.
I’ve also found out something interesting (well, at least I find it interesting) about it. The shale is really a “false coal”.
Apparently, coal only forms from terrestrial plants. The shales are from sea plants like seaweed: and I assume this means they were formed before terrestrial plants existed (that’s my assumption though, not knowledge).
However, if that’s true, then the implication is that there’s no shortage of this stuff at all. Should be beds of it all over the place even if at ever deeper depths. There were, after all, some hundreds of millions to billions of years for it to form.
No, I don’t know and would be happy to be corrected, but given the above my working assumption would be that just about everywhere has some of this stuff: just depends on how deep you can drill.