I see from CAA IN 2011/36
IN-2011/36: Airspace Change Proposal Framework Briefing: London 2012 Olympic and Paralympic Games CAS(T) | Publications | CAA
that in addition to the main Olympics proposals, Manston AND Oxford Airports are bidding for ADDITIONAL restrictions. These would be in the form of CAS(T) to protect the additional IFR traffic that they think will be worked by their airports. As far as I was able to establish from the links, Manston have published a document setting out their proposals. As far as I could see, Oxford has not published their proposals (in the public domain).
The Manston proposal would provide an area of CAS around Manston and under the Olympic CAS. I guess that Oxford would be wanting something similar, but who knows.
Anyone planning a significant operation in the vicinity of these 2 might well wish to have a look at these documents. They seem to be CAS rather than prohibited zones.