Girls of the 'Bulldog' Breed. London's Defenders. - Girls of the Women's Royal Army Corps-they are regulars-on duty in the West London Operations Room 'nerve center' for part of London's defense-to-night (Friday). Girls of the Women's Royal Army Corps were at their ***** in an Anti-Aircraft Operations Room in West London to-night (Friday) to direct the guns combating raiding planes operating over Southern England in the Royal Air Force's autumn 'Exercise Bulldog' Plans of Western Union air force, together with American bombers, are talking part in the week-end exercise, that is designed to give bomber forces experience in attacking strongly depended targets by day and night. September 23, 1949. (Photo by Reuterphoto).