Nantwich Secret Nuclear Bunker, formerly R.A.F. Hack Green
HF: http://hackgreensdr.org:8901
VHF/UHF: http://hackgreensdr.org:8902
Multiple bands on multiple SDRs by G0BXU
RSP1a connected to a colinear atop Oldham Amateur Radio Club's mast, running on OpenWebRX and managed by Charlotte G8CAP
Lots of bands covering HF-UHF, decoders and bookmarks. Very, very useful!
https://openwebrx.soundsofatc.com/
Kelvedon Hatch Secret Nuclear Bunker (https://secretnuclearbunker.com/)
The HF receiver is a KiwiSDR coupled with a wideband WellGood Loop receiving antenna. It covers from DC (well, around 5 kHz) to 33 MHz.
The antenna is currently a Diamond V2000A at 45m above ground (~135m above sea). The bands and frequencies covered are listed below; bands marked with an asterisk (*) may later be configured to have switchable segments within the band.
OpenWebRX SDR covering 6m, 4m, 2m, 70cm. Location: Sonning, east of Reading, Berkshire.
This WebSDR is using RTL Dongle receivers on all bands, on VHF and UHF the antenna is Diamond V2000. The 4 meter vertical antenna is a Siro CX-4-68 4M, located IO91tp. It is operated by M0XVT and G3VHH.
This WebSDR is hosted at Goonhilly Earth Station in Cornwall at 50.0524°, -5.1823° (IO70JB). The WebSDR was upgraded in September 2022 for additional amateur bands.
https://vhf-goonhilly.batc.org.uk/
2200m-10m KiwiSDR by MM3NDH. Antenna is a Wellbrook active loop.