A couple "saved £23k" building a garden office shed from scratch using recycled materials - including insulation saved from a skip.

Graham Anderson, 35, and his wife, Rachel, 34, were working from their spare bedroom but decided they needed more space with their four children running around.

The couple - who are both architects - set about designing and transforming an unused patch of land at the bottom of their garden into a vibrant garden room - to use as a workspace.