First reservoir for 100 years in central London being built
22 August 2013 Last updated at 18:08 BST
Central London is to get its first new reservoir in more than a century as part of plans to bring an end to future water shortages.
It is being built in St John's Wood on the original site of a Victorian reservoir and will serve residents in central and west London.
Professor Colin Green from Middlesex University; Andrew Popple from Thames Water and Malcolm Kafetz, from Friends of Regents Park and Primrose Hill all talk about how the reservoir will benefit London.