Here are some links to other websites that you may find useful:
Royal Horticultural Society
National Society of Allotment and Leisure Gardeners
Charles Dowding's NO-DIG website
"Wildlife on Allotments" pamphlet by Nature England
Seed Swap - to facilitate the
swapping and exchange of heritage/open pollinated seeds (not hybrids).
Our Place Our Planet - Steps to reduce our carbon footprint