They may look like winter's answer to crop circles, but these mysterious snow rolls are in fact a rare natural phenomenon usually found only in the world's most remote and frozen regions.

Also known as snowrollers, snow bales and snow doughnuts, they form mostly in unusual conditions created by a precise combination of snow, ice, wind, temperature and moisture on the prairies of North America.

But this week's frozen weather has allowed the snow cylinders to make a freak appearance in the UK.

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nahhh they are hay bails, the snow build up at the front of them is just were the snow hasnt blown or melted away.

Doesn't look much like a hay bale to me

Wow, check em out on google image-brilliant, beautiful, bizarre.

hmmm I stand corrected lol

they look like woolly swiss rolls...

Hmmmmmmm Swiss rolls.....

I'll have to make one one day - just nee a swiss roll baking tin and some greased paper.

............and eggs, sugar and flour

That's a funny way to make snowballs

Roulade's are better - filled with and covered in chocolate and baileys ganache

And that's an even weirder way to make a snowball !!