I'm not a LEO myself, but have spoken to some people on the force here in the Netherlands. Also check out
Grizzlyb's topic on strobe it mentions one of the lights used by the Dutch police force as well.
In my area the officers used to be issued a Fenix P3D and later followed by the PD30 (I've seen some of those in use this year). I don't know what the current issued light is, but until this year at least it was organized per region.
The Royal Marechausee (Royal Marshals/ Royal Military Constabulary) aren't issued any flashlights. They have some Maglites in their vehicles and offices, so they have to supply their own.
The city surveillance people in Amsterdam (couldn't find a proper translation, but it is not a police force; they have some law enforcement tasks to support the police force) carry Olight M20/M21's on their belt (easily distinguished due to Olights specific holster design).