Siân Maddrell is the Regional Director for our secondary schools in South London and Hastings. Siân is a successful school leader with more than 25 years’ experience. Previously, she was Headteacher of The Grey Coat Hospital for eight years.

Anthony Williams is Chairman of Bluefield Partners LLP, a specialist asset manager for solar infrastructure, and a former Partner of Goldman Sachs & Co where his roles included Global Co-Head of Swaps, Global Head of Fixed Income Arbitrage and Chair of the Risk Committee for Fixed Income, Currencies and Commodities. He is Chair of Governors at Ark Walworth Academy and Chair of Ark's International Education Task Team. He previously held a Research Fellowship in Radio Astronomy at St John's College, Cambridge and has a BA and PhD in Physics from Cambridge, as well as a BA in Philosophy from Birkbeck College, London.