Sarah Thomas was Head of Bryanston from 2005 to 2019. She read classics at Hertford College, Oxford, took her PGCE at King’s, London, and came to Bryanston after helping to run two of Britain's most successful co-ed public schools. She was deputy head at Uppingham for six years and before that spent 13 years at Sevenoaks teaching classics, housemistressing and heading the sixth form.
During her 14 years at Bryanston, Sarah oversaw a number of changes, including a significant development programme on campus, the migration to an online version of Bryanston's distinctive paper ‘chart’ and the successful introduction of the IB to the sixth form. Bryanston continued to thrive under Sarah’s leadership and in 2015 the School was rated as excellent across the board by the Independent Schools Inspectorate. She retired in July 2019.