I Saw one about three weeks back and I keep trying to catch it again..but of course every time I've tried the sun's been much stronger. Are there any particular conditions that hint at this kind of light?
It takes a big man to admit they are wrong, and I am not a big man.
Usually if a weather front is approaching from the West, this normally produces high cirrus cloud ahead of the rain, also when high pressure has been around for a few days the pollution can't escape into the atmosphere and can give this effect at sunset.
Firstly the timing of the front has to be right, for cirrus clouds to be present at sunset look out on the forecasts for rain to fall late evening or overnight
secondly we don't get many days with high pressure, so it doesn't happen that often, typical British weather, too much of this and not enough