At this time Mr Barrow became involved with three think tanks -C Change, the Policy Exchange and Localis - associated with the Tory party's modernising wing championed by rising star David Cameron. In 2004, the year he was appointed a CBE, he made three donations to Conservative Central Office totalling £30,750.
Mr Barrow was elected deputy leader of Westminster in 2005 and leader in 2008. His leadership got off to a rocky start when it emerged that the council had lost £17 million - £10 million on his watch - in the Icelandic banking meltdown.