Whilst doing some research on World War One Intercept stations I came
across this video of an old BBC program held by the UEA film archive.
http://www.eafa.org.uk/catalogue/5108
Apart from the tedious inability of the compère to pronounce the word
Hunstanton properly it's an interesting program. It clearly explains the
role radio amateurs played in setting up the Y station network and there
are some great still photos.