http://www.ianallanmagazines.com/home.php?cat=11
You need Part 1 which is in issue 120 and then 122 for the second part (out shortly). Part 1 of GM Limited in Bamber Bridge, Preston is in January issue 123, and there will be say three parts finishing with the Cleckheaton works.
You giys will then have the complete story: issue 110 had the Southampton CMD. I may then conclude with post-war rebuilds at Southampton to use up my material, but that will not be for a few months.