I read your article “Galliford bags sewage job” (2 November, building.co.uk). There is something I have been banging on about for years. I have written several letters to various bodies about this issue: simply that the largest waste water facility in Europe must produce one hell of a lot of very useful methane gas

Let’s hope someone has enough initiative to put the rather unpleasant pong of Beckton to good use. My own idea was to install perspex tops on the sewage ponds and pipe the gas off and use that to work a generator to power the neighbouring Gallions Reach shopping park.

Harvey Smith