WHertfordshire YeomanryW79th (Hertfordshire Yeomanry) Heavy Anti-Aircraft Regiment, Royal ArtilleryWHertfordshire YeomanryWHertfordshire YeomanryWHertfordshire YeomanryW191st (Hertfordshire and Essex Yeomanry) Field Regiment, Royal ArtilleryW248th (Welwyn) Heavy Anti-Aircraft Battery, Royal ArtilleryWHertfordshire YeomanryWHertfordshire YeomanryW79th (Hertfordshire Yeomanry) Heavy Anti-Aircraft Regiment, Royal Artillery
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