A search for Allotments using Google will produce thousands of hits. Many are web sites which have fallen into disuse. Here are a few links to active web sites relevant to Allotment holders,Gardeners or Windsor residents. These sites contain other links which you will find interesting.
Links updated 5th February 2016
NB: depending on your web browser settings, links may open in an existing browser window. To force opening in a new window, right-click on the link and select "Open in New Window"