Hi there,
I am an archaeologist on the Garrison/Abbey Field site where the circus has been discovered - it is a genuine pleasure to be involved with something so significant.
At this stage, Taylor-Woodrow haven't even designed the development and as a consequence, intend to work with the monument, rather than against it. This, I believe, will take the form of a large open space area. There's also the fact that English Heritage could well schedule the site.
For all the latest info from the site itself, you should check out www.colchestercircus.com