Anybody remember Dogtown? Stacy Peralta, Tony Alva, Jay Adams? They use to do this with a small aircraft to find pools to skate in. Here is an interview of Alva talking about it.
This is also a chance for people in the UK to do so out of the box thinking when it comes to security. If you can find your pool on Google Maps, do something interesting like fill it with Jello before heading off on your vacation. Nothing says party like a trespasser stuck waist deep in Jello.