There are loads of organisations involved in communicating biodiversity. Here are contact details and/or links to their websites.
Association of Local Government Ecologists (ALGE)
The ALGE represents professional ecologists working in local government in the UK. The site includes biodiversity publications with which the Working Panel of Local Authority Ecologists, ALGE's precursor, was associated.
The British Association of Nature Conservationists
BANC are an independent organisation which takes a critical look at the world of nature conservation. They analyse what's going on, debate the values behind conservation policies and legislation, and put new ideas on the agenda.
England Biodiversity Group
The England Biodiversity Group, which involves stakeholders from public, private and the voluntary sectors, advises the Government on the implementation of the UKBAP in England.
The Scottish Government – environment pages
WWF-UK works on both global and local environmental issues.