Lockdown walks: The River Hiz

Due to current lockdown restrictions, walking is the only form of exercise many people can do.

It is good for your physical and mental health and you may even discover something new on your doorstep that you wouldn't have previously had the chance to find.

BBC London's Tom Edwards has been documenting his favourite walk, along the River Hiz, a pure chalk stream which makes it a unique habitat for birds and other wildlife.