Imo, less Russian and more back channel 5Eye comms reception from UK.
The CIA was using UK as its cutout and workaround to bypass the laws preventing it from working against US citizens within the US borders.
Rapid reaction comms to respond to events as they transpired would be a good have for the coup-ers. Especially if they believed the comms to be untraceable and uninterruptible. Just background noise that no one would be interested in.
BBC PAYS FINE FOR FAKE NEWS ABOUT TRUMP AND UKRAINE
https://www.bbc.com/news/world-us-canada-47719166