| GMB Union - Britains General Union. The GMB is a general union of 600, 000 people of whom nearly 40% are women. The three capital letters GMB are the registered name of the union. The union today is the sum of a number of mergers of longstanding trades uni Subscribe GMB Members Survey Spring 2008 The results of this survey will only be used by GMB. The results will not be used for any other purpose and will not be shared with any other organisations. GMB Pay and Conditions Service
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