Renewable Energy Consumer Code - https://www.recc.org.uk/

Energy Saving Trust Scotland - http://www.energysavingtrust.org.uk/scotland

Microgeneration Certification Scheme - http://www.microgenerationcertification.org/

SNIPEF - http://www.snipef.org/

OFTEEC - http://www.oftec.org.uk/

B & L Builders - https://www.facebook.com/pages/B-L-Builders-Orkney-Ltd/705982702799552

A Flett - http://www.alfredflett.co.uk/

R Clouston Ltd - http://www.r-clouston.co.uk/