The National Physical Laboratory is the United Kingdom’s national standards laboratory and is among the world leaders in the science of measurement. The development accommodates an array of laboratories for conducting the science of measurement. Inevitably these laboratories require precise control of the environmental conditions, with temperature control requirements in some laboratories of +/- 0.1 deg C and humidity control requirements of +/- 5% RH with 24 / 7 operation.  We have been involved in technical advise and assistance to the contract delivery team.