Dr David Toke is Director of 100percentrenewableuk Ltd, a non-profit research and campaigning organisation. He is also Reader in Energy Politics at the University of Aberdeen. A central aspect of his work is research and campaigning in and about solar pv. In 2007 he was a key person behind the drive to establish feed-in tariffs mainly for solar pv in the UK. Over the last year he has spearheaded a campaign, organised by 100percentrenewableuk, for mandatory solar pv on new buildings.