By late 1941 , most of the Royal Navy and Royal Air Force military personnel had left for duties at other Y-stations , and the main part of the site became the home of the Royal Signals . Military personnel were still being trained inside the hall for various tasks until the end of the war . In February 1942 the first of the newly trained ladies of the Auxiliary Territorial Service arrived at Beaumanor and were billeted in outlying villages and Garats Hay hall . Beaumanor became one of the most important of the small number of strategic intercept stations , or " Y stations " , intercepting enemy radio transmissions and relaying the information to " Station X " , at Bletchley Park , for decryption and analysis . It is known that one of the first confirmations of the successful Operation Chastise mission was received here . It is also widely rumoured that this listening post knew details of the Katyn massacre as early as 1941 ; however , the British government files were not released to the public , as it would implicate surviving perpetrators
Katyn massacre
Katyn massacre
Beaumanor Hall