Special Branch operations at Gatwick are almost always based upon specific intelligence. As I mentioned earlier, I've worked a lot with these folks over the years and they are the most professional police officers I've encountered anywhere in the world. They don't have the time or resources to go on fishing expeditions.

This is not a bunch of wannabe cops playing fortune teller at an airport carnival like the TSA SPOT program. This is the real deal. The fact that the OP's interaction appears to have been quite pleasant speaks volumes in comparison.