 Browne was Director of Policy Exchange, the largest centre-right think tank in the UK, where he succeeded the founding director Nick Boles.He ran Policy Exchange for eighteen months, during which time it doubled in size, but attracted criticism that it came too close to Conservative leader David Cameron.Browne has written and contributed to various publications, including a book on whether Britain should join the European single currency, which entered the Sunday Times best-seller list; a pamphlet published by Civitas