transmission lines before the electricity reaches the local network serving final consumers. Sufficiently large power generators can be installed to serve all consumers that are connected to local electricity transformers. If electricity supplies to the local transformers fail, as happened recently in London, the CHP power plant continues to run and local users can continue to receive electricity and heat. Architecture Ltd are currently involved with the upgrade of the district heating system at Roupell Park Estate in Brixton to a Combined Heat and Power (CHP) system which will demonstrate the benefits of using the waste heat from Power Generation to heat dwellings.