Wharfedale were a major manufacturer of HiFi loudspeakers. There were many models : Denton, Linton, Glendale, Dovedale, Airedale.....the most recent being the Diamond which was (is ?) available in many configurations, bookshelf, floorstander and active. Just checked, still doing HiFi stuff.
I believe it was the pro music side of Wharfedale that Steve Grindrod became involved with. Some background info here:
http://www.mi-pro.co.uk/news/read/feature-albion-amps/016412