This is supposed to be my last Riverwatch for a few weeks. I say ‘supposed to be’ because my wife and I are scheduled to be flying to Hawaii to celebrate my 60th birthday on Saturday. But as I sit at home writing these notes with a week to go before ‘The Big Holiday,’ the sky is a brilliant, clear blue without a vapour trail in sight and there isn’t an aircraft to be seen in the sky. It’s worryingly quiet.

As regular readers of this column will know, I’ve written a number of times about the problems of illegal fishing on the Thames and its tributaries in our area – and despite increased vigilance from the Environment Agency, it has clearly not gone away.

I never cease to be amazed by the wonders of Mother Nature. Just when you think you understand her whys and wherefores, she does something completely unexpected. Take the population of eels inhabiting the River Thames, for example.