As BAA pulled the planning application for the extra taxiways because they did not want to confuse it with the Operational Freedom Trials, can I assume that the extension of the Op Freedom Trials pushes the civil works to exploit the Cranford Agreement abolition even further into the future........
Correct.
As I understand it, the additional access/exit taxiway works will be done at the same time as the planned resurfacing of the southern and northern runways (2013 and 2014, respectively), unless anyone knows better.