Business Rates

  • Yvonne Clempson

    Research Assistant Yvonne came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety. She joined Aitchison Rafferty in 2019 and works within the Business Rates Team. Her role involves researching property occupiers and key contacts across England and Wales, supporting colleagues in identifying opportunities to help businesses reduce their business rates liabilities. She…

  • Will Bolton

    Property Referencer Will joined Graham + Sibbald following the acquisition of Aitchison Raffety in 2025. He started at Aitchison Raffety in November 2024 as a Graduate Surveyor, specialising in business rates. He holds a First-Class BSc (Hons) in Property Finance & Investment from Nottingham Trent University, where he developed strong expertise in financial modelling, market…

  • Stacey Matavesi

    Director Stacey joined Graham + Sibbald following the acquisition of Aitchison Raffety in 2025. She started at Aitchison Raffety in 2024 as an Associate Director in our Business Rates team. She is experienced in the rating valuation of all bulk classes including warehouses, offices, and retail. She also has experience with specialist classes including healthcare…

  • Stuart Hesketh

    Client Relationship Director Stuart has over forty years of experience in various aspects of marketing and client relationship roles, with the last 26 years focused specifically on the commercial property market. He joined AR in December 2003, he came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety. Stuart has since played a…

  • Paddy Waldron

    Senior Surveyor Paddy is from and based in Manchester. He joined the business through Graham + Sibbald’s acquisition of Aitchison Raffety, having originally joined Aitchison Raffety in September 2025. He holds a BSc (Hons) degree in Building Surveying whilst studying and living in Leeds, but has specialised in business rates since 2021. Paddy has experience…

  • Max Williamson

    Associate Director Max joined AR in May 2025 and has over 10 years’ experience in commercial property advisory; having previously worked for Lambert Smith Hampton and the Valuation Office. He came to the business through Graham + Sibbald’s acquisition of Aitchison Raffety. He has vast experience in bulk class advisory of warehouses, offices and retail;…

  • Mark Ohanaka

    Client Relationship Consultant Mark is part of the London Business Rates team and is responsible for retaining and gaining new clients throughout the UK. Hailing from a Sales/Marketing background and having graduated with an honour’s degree in Business/Marketing, he has worked in the commercial property arena since 2010 Informing and educating clients about the potential…

  • Kane Mallen

    Senior Administrator Kane is a senior administrator within Business Rates and has a strong background with over seven years of experience in administration. In this role he provides support across business rates ensuring accuracy, compliance, and timely delivery of statutory processes. His areas of expertise include account administration, data management and customer service. Key responsibilities…

  • Joe McCarthy

    Executive Director Joe has over 12 years’ experience in business rates and heads the England and Wales business rates team, whilst maintaining an active caseload across a wide range of rating matters. Joe specialises in the central London office and retail markets, having advised occupiers and investors on all aspects of rating liability, appeals, and…