On Merseyside - at least - I've seen a few Gatsos being replaced with the very similar PEEKS cameras. The main difference is they have two lenses one above the other and are forward facing but they are Gatso yellow in colour so easily confused at first glance!

These cameras don't always flash, they run off a loop from road strips and capture your car number with infra red. Keep an eye out for them if you're around the Merseyside area.