There are sort of diagonal lines crossing Scotland and N Ireland, so you again get the basalt columns at the Giant's Causeway in N.Ireland, all on the same diagonal line as Staffa.
There are a series of "volcanic plugs" across E Scotland, of which Edinburgh Castle Rock is one, then there's N Berwick law and so on.
My brother-in-law is a geologist, from N Ireland originally but long-time resident in Scotland, and he has a big geological map of the UK up in his dining room!