Key Green Party figures, including leader Caroline Lucas MP, Green MEPs Jean Lambert and Keith Taylor, and Green London Assembly Members Jenny Jones and Darren Johnson, have signed up to the Kick Nuclear coalition.
They have signed up both as individuals, and on behalf of the Green Party.
The London group is part of the Stop Nuclear Power Network, which was formed earlier this year to campaign against government plans to commission a new generation of nuclear power stations next spring.
In October, the group launched the Boycott EDF campaign, calling on EDF Energy customers to switch energy providers, as a protest against the company's position as the principal promoter of nuclear energy in the UK.
1. The campaign website offers information on switching providers, and a list of more environmentally friendly energy providers. For more details of the Boycott EDF campaign, visit their website at http://boycottedf.org.uk/.