Locating the source of a very active RF transmitter

Hi all,
I’ve just setup the Sonoff RF Bridge using Pinkywafer’s excellent tutorial. Hardware and software mod - I’ll add a link if anyone’s interested.)
I’ve been able to get a few devices added without any problems, however this is a source near me that’s pushing out near constant messages under a protocol of 8. It’s none of my devices as far as I can tell, but it fills my logs very very quickly…

Any ideas on how to track down the source? I’m thinking perhaps that it’s a nearby utility meter perhaps…

Maybe stupid question, but what are you going to do if you locate the source ? Quarrel with your neighbors until they shut down the device ?

To be honest, not really thought of that, was more interested in if it was something in my house that I should be monitoring perhaps…