I've just managed to find all six parts of the RHS series, published in their magazine called The Garden, which they call Living Gardens. Published every month since April 2012. The RHS is part of a group of organisations with a common interest in wild life but covering a wide range of interests. The leading group is Natural England and you can find out more by using the link below.
Natural England - Getting involved
The key words are : getting involved. In Somerset the Wildlife Trust will help you.