A report into the system by which the NSW government is compulsorily acquiring millions of dollars worth of land for controversial projects such as the WestConnex motorway may never be released, confidential documents show.

The report by David Russell SC was commissioned by then-finance minister Greg Pearce in May 2012 and released in February 2014, but has been kept secret ever since. All but two of the independent review’s recommendations have been rejected under advice from an interdepartmental committee, according to documents obtained by…