Bonus episode to mark 10,000 Radio Lento downloads. This is a shorter but no-loud-noise version of episode 29 'Trains planes and estuary birds'. Now in high definition sound, this an opportunity to hear the evocative sounds of the Thames Estuary at low tide, without the noisy aircraft which was included in the original episode. Since starting the podcast, we've covered 142 miles on foot with our children and the microphone gear, listening out for peaceful places to record. We don't have a car, so travel out of the city where we live on public transport. Trains can often be heard in our recordings, as they can in this one. It's a cloudy late August afternoon on the banks of the Thames Estuary near Benfleet in Essex. Wild gusts of wind race in over the water. Birds swoop and swirl over the exposed mudflats, hunting for food. Redshanks, gulls, little egrets, oyster catchers, curlew, avocet, crows. When the wind drops, the newly exposed mud and silt can be heard bubbling and popping in the drying air.