Fgas guidance - https://www.gov.uk/government/collections/eu-f-gas-regulation-guidance-for-users-producers-and-traders

The carbon trust - http://www.carbontrust.com/home/

Energy technology list - http://etl.decc.gov.uk/etl

Institute of Refrigeration - http://www.ior.org.uk/

Danfoss - http://refrigerationandairconditioning.danfoss.com/home/

Refcom - http://www.refcom.org.uk

NAS - http://www.apprenticeships.org.uk