A new edition of the Lea Valley Walk guide is out marking the 25th anniversary of the first guide.

This fourth edition includes changes on the ground, new research and new pictures.

The first guide was commissioned for Millennium Year 2000 by the Lea Valley Regional Park Authority.

The fifty mile path follows the River Lea from just above Luton to go down the east side of London and join the Thames opposite The O2 arena.

In 2000 The O2 arena was known as The Millennium Dome.

The Walk highlights the capital’s hidden back garden which, whilst being the birthplace of the technological revolution starting with the lightbulb, has become more green over the last quarter of a century.

The 2012 London Olympics played a part in that transformation as well highlighting the Lea Valley and a place for recreation.

Railway stations on National Rail, the Weaver line and the Underground allow for easy access.

Below are some of the new photographs in the latest guide.