I’m attempting to travel from the source to the sea down the River Thames. That’s 210 miles of wading, swimming and kayaking along Britain’s busiest waterway. And to make things harder I’m ...

Opened in 1996, the Thames Path National Trail weaves with the river, from its source near Kemble (an often-dry patch in a field) to the Woolwich foot tunnel.

The government has given the green light to a new 14-mile road and tunnel to connect Kent with Essex below the Thames. It’s ...