On Fri, 26 Feb 2016 09:05:45 +0000, charles wrote:

Droutwich carrying World Service is relatively new. Until Orfordness was
opened (late 70s?) the medium wave came from Crowborough (Aspidistra)
which used quite directional aerials, so not much UK coverage)

They weren't as directional as they originally thought - and hoped. They
only found out about 30 years later that the gain in desired direction
was pretty much zero. I enjoyed a guided tour around it when it was still
operational; mostly underground and like something out of James Bond.