<snip> We have to have hazard triangles and hi viz vests for European driving, but I notice our police have started using bright blue flashing LEDs atop small traffic cones. Very effective in the dark and rain. AFAIK you can't get road flares here but they sound like an important safety aid if you break down or need to warn other drivers about a hazard. I think the RAC LEDs might be a useful alternative and sensible addition to my car emergency kit.
Chemical road flares are environmentally unfriendly, and LED road flares if raised 10 inches above the ground can be as effective without a negative environmental impact. It has been suggested that blinking LED road flares, if they are not linked together and co-ordinated, may cause confusion, and actually lead an oncoming driver in the wrong direction.
I commend you for your foresight, and concern, and the fact that you bought at least ONE LED road flare.
I also carry three reflective hazard triangles. They can be very effective!
Last year, on the way to drop our grandchildren off at school, we passed a gal broken down, at the end of a blind curve in the road. My wife suggested that I stop and try to help, on the way back. When we got there, a police officer was there on the scene, with his lights flashing, BUT he was also at the end of a blind curve! Someone could come barreling around that curve, only to become brutally aware that he was about to become a part of the police officer's trunk! I pulled behind the officer, put my flashers on, and ran down the road with my traffic baton in hand to warn traffic away. Fortunately, no one got hurt.
It's important that your first warning of danger is far enough away from the scene that oncoming traffic can see it with ample time to react. You might have to crest a hill, or turn the bend in a road. A single strobing flashlight may not be enough to make a scene safe.
If you are setting up those triangles set them up far enough away that the oncoming traffic actually has time to react.
I find it incredible how stupid so many drivers are, and that they will drive right up to the warning device before they change lanes. All the while they may be hiding it from the view of the driver behind them until they actually make the lane change. He then may not have the time to react, unless it was placed far enough away from the actual scene.