There is a very brief history of allotments that you can find in the wiki
http://www.allotments4all.co.uk/smf/index.php?page=9It includes a section with links to individual allotment site histories. There are currently 44 entries.
It is around this time of year that I usually look for new additions. However, as time goes by it is becoming more difficult and time-consuming for me to unearth new histories by wandering round the web.
If there is a history on the web for your site, and you cannot see it listed in the wiki article, then it would help me if you could let me know of its existence.
The current entries range from roughly 300-400 words upwards. The majority are roughly equivalent to a sheet of A4 with a small number of more detailed pieces.
If your site does not yet have a history then this is where I try to persuade you (or a.n.other on your site) to produce one. It can make for a useful winter activity ... end of sell.
Thanks