Cheddar reservoir

This morning's walk in our local area of outstanding natural beauty. Cheddar reservoir, a two mile circumference walk with birdlife.

And if you swim near the pumps, you'll get to visit all of Bristol

Like my wrap-around mirror shades?

As we were returning to our point of departure after an hour, I could neither see our car nor recognise that strange pumping tower ahead. I speculated:

'This circular walk has an odd, helical topology - as you progress around you slip into an alternate universe, one which happens to lack our original car park."

Clare was quick to pooh-pooh this suggestion - and within the next few yards I could see that I was in fact mistaken.

That, and the linearity of quantum mechanics.