Don't miss the "All the data captured by the investigation has been put in a Google document" link that points to a 50mb file called "Complete BB firewall logs.rtf," which I'm sure will be of interest.
If someone with a bit more domain expertise could point out the smoking gun here, it could be very interesting.
If you want a location, then I suggest: grab a spectrum analyser; head to Knightsbridge; tell me what happens when you get close to Hans Crescent; then look on the corner and guess why.
And, don't take your phone. Obviously.
https://www.google.com/maps/@51.499897,-0.163137,3a,49y,276....
Would you happen to have a picture of the install they have in that area?
I work for a company with a huge dataset of cell tower observations, and so I was interested in locations that I could investigate. I'll try your suggestion and see if I can find anything suspicious.