The area of Soham has some fascinating history, some which may surprise (well it certainly did with me). If you have time I encourage you to read about this and have placed some links to websites below. The first link is the easiest read for those just wanting a quick insight into the commons. For more on the history of Soham the next two links will provide some excellent insight. It's also worth noting that the www.soham.org website has lots of other excellent material on Soham which is well worth a read.
http://www.soham.org/index.php/history/the-commons-horse-fens
http://www.soham.org/index.php/history/a-timeline-of-soham-history?limitstart=0
http://www.british-history.ac.uk/vch/cambs/vol10/pp489-499#fnn213