An image made in 'waterfall country' near Ystradfellte in the Brecon Beacons National Park last autumn. I watched as the whirlpool gathered in size and momentum and just about had enough time to set up the camera and tripod before it disappeared, one of those fleeting moments when it all comes together.

An image made in ‘waterfall country’ near Ystradfellte in the Brecon Beacons National Park last autumn.

I watched as the whirlpool gathered in size and momentum and just about had enough time to set up the camera and tripod before it disappeared, one of those fleeting moments when it all comes together.