Senior Leadership Team

Please click on the tabs below for more information about the members of the Senior Leadership Team: 

Andrea Greystoke, High Mistress

Born and raised in New York and San Francisco, Andrea was educated at Radcliffe College, Harvard University, The University of California at Berkeley and King’s College, London where she pursued undergraduate and graduate studies in Mathematics. Having married a British subject, Andrew Greystoke, in 1970 she has lived in London ever since, apart from a five year stint in Manhattan due to Andrew’s professional commitments.

Andrea became the first female teacher at St. Paul’s Boys’ School and subsequently in the same capacity at King’s College School in London. She left teaching to have her (6!) children – all of whose names begin with an “A” -- but returned to education with the foundation of Abercorn School in 1987. In 2006 she started its sister school in New York, the British International School of New York, located on 23rd Street and the East River. A third school, Abercorn International, opened in 2010 in Austin, Texas.  As you may gather, Andrea loves children!

Andrea is the designated Early Years Director at Abercorn School. 



Benedict Dunhill, Headmaster

Benedict joined Abercorn School in 2015, along with his wife Elizabeth, three children and a miniature daschund. Born and educated in the South East at Caldicott School and Cranleigh School, Benedict completed his formal education with a BA degree in French Language and Literature at University College, London. After some years working in the City, he turned to his true vocation, education, as a French teacher at Blundell’s School in Tiverton. This was followed by a move to Worth School where he was a Housemaster before being appointed as Headmaster of Moreton Hall, Suffolk in 2004. It was from here that Benedict joined Port Regis School, Dorset in 2010. During his tenure there, Benedict led the school through a highly successful ISI inspection and has continued to position Port Regis as one of the foremost independent boarding schools in the country.

Rebecca Stewart, Head of Early Years

Rebecca joined Abercorn as Head of Early Years in September 2012 after relocating from Mexico City, where she was the Head of Kinder (responsible for over 250 children aged between 1-6 year olds) at a British International School for two years. Prior to this she worked in London as a Phase Leader for Nursery, Reception and Year 1.

Rebecca also has experience as an Early Years Foundation Stage Profile Moderator. 

Amy Thompson, Deputy Head of Pre-Prep (On Adoption Leave)

Having studied European Studies at The University of Hull, Amy went on to complete her PGCE in East London. After working for two years in a junior school in Muswell Hill, London, Amy packed her bags and headed to the Middle East where she worked for two years in a large international school in the heart of Dubai where she became head of teaching and learning.

Feeling the need for a variety of seasons, she continued her journey east, to work for the next four years in Shanghai where she became head of Year 4 at Dulwich College, Shanghai. Upon returning to the UK, she took a little time to settle but happily joined Abercorn in 2011 and became Deputy Head of Pre-Prep in 2012.

Cathy Murray, Acting Deputy Head of Pre-Prep

Head of Year 1 Cathy Murray has worked at Abercorn for many years and has taken on the role of Acting Deputy Head of Pre-Prep this year. 

Kirsteen Jack, Director of Studies & Deputy Head of Prep

Having originally trained in Scotland, Kirsteen moved to London in 1995, where she took up post as a Year 4 teacher in a large junior school. After two years, she joined a small independent school in South East London, where she taught Years 2-4, in addition to having the responsibility of Mathematics coordinator and finally Acting Deputy Head. Kirsteen continued her passion for numbers by taking up the post of Head of Mathematics at Abercorn in 2005, and in 2007 she widened this focus to include all areas of the curriculum when she acquired the role of Director of Studies/Deputy Head of Prep. Kirsteen currently oversees the day to day running of our Portland Place premises, housing Years 4 to 8.

Abigail Snell, Director

Educated in London at St. Pauls’ Girl’s School, Abigail attended the University of Manchester where she completed her BA in Linguistics. She undertook a Masters degree in Marketing and Management in London, graduating in 2000.

Following her MA, Abigail worked for various Advertising agencies including Publicis before moving ‘client-side’ as a Brand Manager for L’Oreal in London. After two years she moved to New York with L’Oreal to assist in the launch of a new cosmetics line for the company.

Looking for a change away from consumer goods and a move into a more strategic role in the family business, Abigail joined Abercorn's sister school The British International School of New York as Strategic Director in 2006 where she remained until 2013, before returning to London with Abercorn School. She returned to New York in 2016 and is now Deputy Chief Executive of both BIS-NY and Abercorn School in London.

Abigail has two children, and is a proud parent at The British International School of New York.

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