As someone who had come from a management, rather than a programming background, after taking up his post, Deverell created two new Creative Directors of the CBBC and CBeebies services respectively renaming his title, Controller of BBC Children's.
[6] In 2012, Deverell was appointed the Director of Royal Botanic Gardens, Kew, of which he had been a trustee from 2003 to 2009, during which time his contributions included chairing the Board Audit Committee.
As Director, Deverell became responsible for: the botanic gardens and collections located in London and Wakehurst, Sussex; and a large number of UK and international plant conservation and research projects.
In December 2014 he appeared in front of the Science and Technology Select Committee of the House of Commons,[8] to explain the reasons why and to outline the support RBG Kew needed from government and elsewhere.
Deverell was appointed Commander of the Order of the British Empire (CBE) in the 2024 New Year Honours for services to botanical science and conservation.