A suggestion of that sort was made in post #8. As I said in response, the primary use of the property during the war was not merely "ostensible". I have (in the distant past, since few such people are still around) spoken to people who confirmed that it was used throughout the war as a "Food Office" and, as such, most/all of the building was constantly accessible to the general public - which would seem to make it relatively unlikely that any ('secret'/'clandestine') 'other activities' were going on there - but, as I also said, "Who knows?" !The ostensible war time use may have been a cover for other activities.
No. It so happens that where I now live is quite close to Bletchley Park, but the property in question is on the south coast.Is it anywhere near Bletchley park?
Kind Regards, John