Sir John Egan has attacked housebuilders for not implementing the recommendations in his Rethinking Construction report.

Speaking at a reception at the House of Commons to mark 10 years since the publication of his report, Egan said he would rate the construction’s performance since as “four out of 10”.

Egan particularly criticised housebuilders for failing to follow the guidelines laid down in his report.

He said: “Housebuilders have made no cost improvements at all. Absolutely nothing. Also, their productivity processes actually generated much less than half of the demonstration projects.”