Lydia Southern Director - Tax Disputes

Lydia is a London-based Director specialising in tax disputes. She supports individuals and corporates in resolving complex HMRC matters, using her technical expertise to guide clients through challenging positions and achieve settlements through negotiation or litigation.

Experience 

Lydia has over 13 years of experience in tax disputes and resolution, specialising primarily in personal tax matters. Her work spans a wide range of issues, including Self‑Assessment enquiries, residence and domicile challenges, Capital Gains Tax and Inheritance Tax disputes, employment status and IR35 matters, offshore tax issues and worldwide disclosures. 

She is also experienced in addressing tax avoidance scheme enquiries, penalties, discovery assessments and serious fraud investigations under Code of Practice 9. In addition, Lydia has substantial experience representing clients before the First‑tier and Upper‑tier Tribunals, helping secure effective and pragmatic outcomes.

Work highlights

Lydia has a strong track record in resolving complex and high‑value tax disputes, leading sensitive investigations from initial disclosure through to successful resolution. She helps clients navigate uncertainty and reputational risk with clarity and confidence, earning trust through her measured approach and strategic insight. 

Known for identifying opportunities to bring matters to an effective close, she consistently receives positive feedback from clients and intermediaries. Lydia advises a wide range of individuals, corporates and trusts across all areas of UK tax disputes, applying her broad expertise to deliver clear, practical solutions in high‑pressure environments and achieve constructive outcomes.