About us

About Us

Trio Accountancy Services are not just your average accountants.  Despite having a long history of producing great results for firms of all sizes and sectors, Trio is all about personal service, ensuring that clients have first-name contact with their specialist at all times and ensuring the customer-first philosophy goes right through everything they do.

Since inception in 1980, Trio Accountancy have grown to provide a whole range of business services with experts in payroll, business accounts and tax planning.  Whilst based in Cheltenham, we offer a wealth of experience in accountancy management for both UK and overseas based businesses with some great client case studies across several geographical areas.

Our Team

Mervyn Sanderson FAIA CTA

Managing Director & Chartered Tax Adviser

Trio is headed by Mervyn who has built this specialist accountancy services company into one of Cheltenham’s leading professional firms with an excellent reputation for quality advice and superior customer service. With more than 20 years experience in the tax profession, Mervyn is a member of The Chartered Institute of Taxation and a Fellow of The Association of International Accountants. Mervyn likes to relax by attending Cheltenham race meetings, especially the annual festival.

  • Email Mervyn Sanderson FAIA CTA
  • Tel: 01242 584046

Mark Faherty AAIA ATT

Tax Manager

Mark has been a key senior member of Trio for 17 years, managing a mixed-tax (direct and indirect) portfolio including multi-national groups, small companies, professional partnerships, owner-managed businesses, trusts and personal tax. He is a fully qualified International Accountant and Tax Technician.  Prior to joining Trio, Mark worked for Price-Waterhouse-Coopers and HM Revenue & Customs, so brings a wealth of knowledge and experience to Trio. Mark is a lover of both classic rock music and cycling - being particularly passionate about his bicycle collection.

  • Email Mark Faherty AAIA ATT
  • Tel: 01242 584046

Marie Trigg AAT

Accounts Manager

Marie has been with Trio for 17 years and manages the accounts production for our clients both large and small. The clients for whom we prepare accounts cover a wide spectrum of businesses, and vary in size from sole traders, to companies with multi-million pound turnovers. Some of these clients need monthly accounts for management purposes, and Marie ensures that these are accurately produced to strict deadlines. Marie enjoys being a spectator at sporting events, particularly Gloucester Rugby.


Candy Sanderson

Payroll Manager

Candy has been with Trio for 16 years managing our payroll department. Candy maintains the payrolls for businesses with only a few employees, as well as for those with several hundred. She ensures that all aspects of payroll administration are attended to so that everyone is paid on time and that the employer conforms with all current payroll legislation. Candy enjoys singing with The Rock Choir and loves horse riding.