Go outside and look North, maybe slightly to the East of North. Fairly low in the sky is a star.
It's as steady as a rock, location-wise, but it's flickering quite madly, and not at all in sympathy with the other stars around it, so I doubt it is just mere atmospheric conditions causing this. The weird thing is, it's also changing colour. Flashes of green and red/reddish orange in with the flickering white light.
I've just stood out back and watched it for a good 15 minutes.
Weird. End times, I tells yer.