Big Energy Week (16th-21st Jan 2012) is an advice campaign on reducing energy bills being co-ordinated by the Citizens Advice Bureau. It is supported by consumer organisations, charities, Government, energy suppliers and switching websites. There will be over 100 events at local venues around the UK (mostly at CAB offices)
I enclose the full list of events on / in London and the South East below.
Further advice will be available nearer the time at www.bigenergyweek.org.uk – in the meantime the link takes you to a holding page with a brief explanation of what Big Energy Week is.