This is not a Southwark Green Party event - but we recommend it for an understanding of where waste goes from Southwark. It's a drop-in event, on a first come, first served basis, with tours lasting about 30 minutes.
Please see details here https://www.veolia.co.uk/southwark/tour-facility-21-september-2019
43 Devon St
London SE15 1AL
Google map and directions