Clouds

Drove north to the canal basin where I wanted to take photos. 
Unfurled tripod with one hand and threw open camera case with the other. Lenses but no camera. Drove south.

Picked up camera. Drove north to canal basin. 
Swans in basin. 
Swans flew away (west), but why didn't three of them take off together?

Never work with swans.
Never hang about on deserted, landlocked canals hoping for an interesting image. Nothing moves, nobody appears, there wasn't even a ripple on the water, apart from when the swans flew away.