Getting back to the Aspidistra site in the Ashdown Forest at Kings Standing near Crowborough, it was a site for the re-transmission of information that emanated from in the Midlands at Milton Bryan in Bedfordshire. The generators on this site at MB were 3,000hp 16-cylinder Crossley Premier engines fitted with superchargers.
'Aspi 4' actually refers to a 50kw Marconi short wave transmitter.