Here’s a map with points of interest culled from Prometic’s site, hosted by those chaps at BatchGeo.com.
View Prometric Sites UK in a full screen map
Although you can book your exams easily enough at www.prometric.com, trying to find out if there’s one near you can be painful, to say the least.
This map shows all of the UK Prometric testing centres that hold Microsoft exams, as at 16 November 2013.