Polly joined our Horsham team in 2020, where she advises clients on all aspects of family law including financial and children matters, as well as nuptial agreements and cases involving relocation. A family law mediator, Polly become an accredited mediator in 2026 and is a member of the National YRes Committee.
A family law specialist, Polly trained and qualified at a City firm with offices in the UK, Europe, the Middle East and Hong Kong. She grew up in West Sussex and following university studied for the GDL and LPC in Guildford.
Polly’s extensive experience includes high value, complex financial matters, particularly in cases involving owner-managed/run businesses and family businesses. She has also worked on cases with an agricultural focus, advising on issues surrounding family farms, intergenerational wealth and assets passed down through families for many years. Polly has dealt with a number of cases in which non-disclosure was an issue, including representing clients in committal proceedings and in the High Court.
She has acted on a number of longstanding children matters, including cases with public law crossover and the involvement of a special guardianship order and criminal allegations. In addition, Polly has worked on a number of internal relocation cases and applications for transfer of residence.
Polly also advises on nuptial agreements, including drafting pre and post-nuptial agreements and, more specifically, cohabitation agreements.
She is a member of Resolution, where she sits on the National YRes Committee, as well as the West Sussex YRes Committee where she plays an active role in organisation local events and seminars.
Polly is recognised in the Legal 500 UK 2026 guide as Recommended Lawyer and Mediator, where she is described as ‘very responsive and very numerate.’
In the 2025 edition she was also a recommended lawyer and mediator: “Polly Dallyn works incredibly hard for clients. She is efficient, bright and understands what a client/court/barrister needs, almost before they do. A real star of the future.”
Previous editions describe her as “phenomenally hardworking and intelligent, Polly brings clarity to the most complicated cases. Her attention to detail often makes all the difference to the outcome of client’s cases.”
Polly’s SRA number: 624947
Polly lives in Storrington and is passionate about the West Sussex countryside. In her spare time she likes to ride her horse, walk her dog and generally spend time outdoors.
she combines attention to detail with warmth and support
"Thank you for all your support and guidance over the last 20 months. You have both made this process as smooth as you possibly could for me and my children".
