The distributors today are the much-amalgamated successors of the privatised regional electricity companies, which were themselves successors of the area electricity boards. Most of them have subsequently adopted names that are less geographically precise,* but Scottish Power (which formed out of the South of Scotland Electricity Board) haven't, despite also taking on the North Wales, Merseyside, and Cheshire area distribution license.Given the station isn't in Scotland, someone other than Scottish Power would have been my initial assumption!
* = that said, until last year, the license holder for the East Midlands was known as Western Power Distribution.