Old Mill appoints Helen Lewis as Private Client Tax Director

9 November 2026

Old Mill has appointed experienced private client tax specialist Helen Lewis (pictured) as Private Client Tax Director, further strengthening its expertise in inheritance tax, trusts, estate planning and specialist tax advisory matters.

Helen brings more than 25 years of experience in professional services, including senior technical and advisory roles within the accountancy profession and at leading tax publisher Tolley, with extensive expertise advising high-net-worth individuals, business owners and landed estate families.

Her appointment supports Old Mill’s continued investment in specialist advisory capabilities, particularly as private clients and their advisers navigate increasingly complex tax, succession and wealth preservation considerations.

Helen began her career in professional practice in 2000, where she qualified as a Chartered Accountant, Chartered Tax Adviser and Trust and Estate Practitioner. During more than two decades in practice, she advised owner-managed businesses, private clients and high-net-worth families on a broad range of tax matters.

For the final five years, she held the position of Technical Director within a specialist landed estates team, specialising in Inheritance Tax, Capital Gains Tax and trust planning for landed estate families.
Helen subsequently spent three years at Tolley, writing for authoritative technical tax publications including Simon’s Taxes and Tolley Guidance.

At Old Mill, Helen brings extensive technical knowledge and experience to the firm’s tax team, supporting its growing advisory offering to private clients, families and professional advisers.
David Maslen, Head of Tax at Old Mill, said: “Helen brings an exceptional depth of technical expertise, particularly in Inheritance tax, trusts and estate planning, where clients and their advisers are navigating significant challenges.

“Her experience combines many years of advising private clients and landed estate families with an impressive background in technical tax research and publishing. That combination is hugely valuable, not only in supporting our clients but also in developing the knowledge and expertise of our wider tax team.”

Helen added: “I am delighted to have joined Old Mill at an exciting stage in its development. Having spent much of my career advising private clients and landed estate families, I’m looking forward to bringing that experience to the team and working with colleagues to support clients on challenging tax and estate planning matters.

“The opportunity to combine specialist technical expertise with a collaborative, client-focused approach is particularly appealing, and I’m looking forward to contributing to the continued development of Old Mill’s private client advisory offering.”

Old Mill joined Kinbrook Group in November 2025. Helen’s appointment further strengthens the specialist expertise available within the Group, supporting its ambition to provide comprehensive, joined-up advice to individuals, families and businesses across the UK.