Jon,
Many thanks. Did you not think that the square format Combined Operations sign was very unusual? This format became commonplace from the early 1990s onwards (initially I think with the (Joint Service) Permanent Planning Group - initially based in Aldershot and later co-located with HQ UKLF in Erskine Barracks, Wilton. This (PPG) was the "acorn" from which the "mighty oak" of Northwood-based PJHQ grew. Mike
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