asked the Paymaster General if his Department has made or received any estimate of the cost to the United Kingdom construction industry of the reduced performance which would result from the fitting of restrictive check valves to construction equipment as required by CON(LO) 1981–82; and if he will make a statement.

[pursuant to his reply, 8 May 1987]: No. I am advised that valves which are properly designed and fitted should not significantly reduce the performance of the equipment.