The Basics
From its source near the Gloucestershire village of Kemble, to its arrival at the sea in Essex, the Thames is England’s second longest river, a mere five miles shorter than the Severn. The fact that it runs through the capital has made it the scene of many of the key events in the country’s history.
Pollution issues dogged the river from the mid-Victorian era, when sewage build-up caused the prime minister Disraeli to refer to it as “reeking with ineffable and unbearable horror”, until not so long ago. It’s all a lot cleaner now though, so much so that around 80 species of fish have returned to waters that are once again fit for them to swim in.