Siobhan Tyrrell
Valuations Manager
London
Siobhan has over 25 years’ experience in the valuations world, and is a qualified diamond, pearl and coloured stone grader. Since 2003 she has been a Fellow of the Gemmological Association of Great Britain. From 2004 to 2021 Siobhan was a Senior Valuer at Gurr Johns. She then joined Dawsons Auctioneers as Head of Valuations, London, before returning to Gurr Johns as Head of Valuations, UK in 2023. Prior to that she worked at Phillips, Bonhams, and as Assistant Manager at Ambrose Auctioneers, Essex. Having attained a BA(Hons) in her first passion, History, she went on to become a Member of the Royal Institute of Chartered Surveyors in 1994, having achieved top marks in both years on the Southampton Fine Art & Chattels course. Since 2019 her valuation and social history knowledge have featured on the BBC Antiques Roadshow. Siobhan’s years of valuation and advisory experience are sought after by an extensive global network of clients.
