The famous wooden chain home mast formed part of another antenna set similar to an AN/FLR-9 array,

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Firstly, the AN/FLR-9 was a type of very large circular "Wullenweber" antenna array, built at eight locations during the cold war for HF/DF direction finding of high priority targets. The worldwide network, known collectively as "Iron Horse", could locate HF communications almost anywhere on the planet. Because of the exceptionally large size of its outer reflecting screen (1056 vertical steel wires supported by 96 120-foot towers), the FLR-9 was commonly referred to by the nickname "Elephant Cage." Constructed in the early to mid 1960s, in May 2016 the last operational FLR-9 at Elmendorf-Richardson in Alaska was decommissioned. It can be confused with the US Navy's AN/FRD-10, which also used a Wullenweber antenna.

Blakehill's central aerial array was similar to this, but not understood to be identical. 

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FLR-9s were constructed at the following places:

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• USASA Field Station Augsburg (Gablingen Kaserne), Germany

• Chicksands, England

• Clark AB, Philippines

• Joint Base Elmendorf-Richardson, Alaska, USA (formerly designated as Elmendorf AFB)

• Karamursel, Turkey

• 7th Radio Research Field Station/Ramasun Station, Udon Thani Province, Thailand

• Misawa AB, Japan, built 1963 to 1965, demolished beginning in 2014.[4]

• San Vito dei Normanni Air Station, Italy (near Brindisi, Italy)

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The similarities to these sites and Blakehill?

Just look at an aerial view of the FLR-9 array in Karamursel in Turkey, compared to a Google Earth image of the former RAF Blakehill (black lines marking the conduit scars added for clarity)

The results are rather striking;