Can confirm Martin and Rob's recommendation. Knew Mick O'Donnell from woodturning years ago, and the grinding and sharpening items were great.
Now moved on a bit to a more commercial operation. If you can't afford CBN then can recommend the Ruby wheels – have them fitted to 2 grinders, a high speed and a low speed..
Have also used Abtec for wheels for the surface grinder, and satisfied with them.