Council chiefs have apologised for "very serious" historic mistakes after an independent review exposed the "gross incompetence" behind the planning for Dargavel Primary School.
The botched calculations, which saw the facility in Arrochar Drive, Bishopton built too small, has left the local authority facing a bill of up to £75 million for a second primary school and extension for Park Mains High School.
An investigation into the errors, carried out by a former chief executive of four councils in David Bowles, examined the Section 75 agreements between the council and landowner BAE Systems and found demand for school places was "substantially underestimated."
