Web-site transdiffusion, have found this article from The Radio Times dated 1950.

"The Caversham Story".

"Every day, all round the clock, the polyglot experts of the BBC’s Monitoring Service record news and comment broadcast by radio stations throughout the world. ALAN HUNTER visited Caversham Park recently and in this special article gives listeners an insight into the workings of what must he the world’s greatest listening station. Its reports not only provide much material for BBC news broadcasts but serve the needs of the Government, foreign embassies, and the Press"