Thanks Green Granite. Yes I'm familiar with these sources and others, but there appears to be nothing from UK sources as far as I can acertain that refers to the disruption to communications caused at the time.
If you want to see 'siggies' and others in operation at Gan have a look at the site with my photos of Gan as it was in 1958 at:
http://groups.msn.com/TonyHawesRAFSe...s19571958.msnw
185 photos of Gan alone.