Hello folks.
The threat now appears to be over. The local communities, businesses and councils have all opposed the plan. It seems that the planners had not done the consulting they should have done and tried to go behind peoples backs.
So, for now at least, the airfield will continue to operate for the flying school, private pilots, the drop zone and all other users.
http://www.huntingdonshire.gov.uk/news/sibson-garden-village-expression-of-interest/