Help needed to identify 'Secret' locations Where was Wolfenstead Y signals intercept station (Nicholls head) Are these ‘Y’ Service premises or SOE etc? Oakwood Mansions (near Olympia), Thames House, Church House, Westminster; Hatfield House where Lord Selbourne was living Any information appreciated Thank you
Thames House is the MI5 HQ, Hatfield House is the seat of the Salisbury Family - Selborne was related by marriage so it was probably a convenient place to stay close to London. Church House was used by the Government during WWII - I believe as Parliamentary Offices and as an alternate House of Commons.
Have you tried the web military intelligence museum at British army museums and records at Army Museums Ogilby Trust