In December 2005, Imperial announced a science park programme at the Wye campus, with extensive housing; however, this was abandoned in September 2006 following complaints that the proposal infringed on Areas of Outstanding Natural Beauty, and that the true scale of the scheme, which could have raised 110m for the College, was known to Kent and Ashford Councils and their consultants but concealed from the public. One commentator observed that Imperial's scheme reflected "the state of democracy in Kent, the transformation of a renowned scientific college into a grasping, highly aggressive, neo-corporate institution, and the defence of the status of an Area of Outstanding Natural Beauty throughout England, not just Wye against rampant greed backed by the connivance of two important local authorities. Wye College campus was finally closed in September 2009.
Try to answer this question if possible (otherwise reply "unanswerable"): When did Imperial abandon their science park program?
September 2006