Accounts Team

David Johnson
0113 831 4770
[email protected]
Formed Yorkshire Medical Accountants May 2011

David formed YMA in 2011 after a career spent within accountancy and more recently the automotive industry covering England and Scotland at board level,

David specialises in medical practice mergers and acquisitions, management consultancy and medical partnership accounting and with over 35 years in practice and industry he can offer a wealth of experience to care and guide on the business journey.

Outside work he suffers the ups and downs of Leeds United whilst also enjoying most sports and travel.

John Horrabin
0113 831 4771
[email protected]
Qualified as a Chartered Accountant (ACA) in 1993 and became an FCA in 2009

John trained with a top 10 accountancy firm then worked in general practice with a small firm covering a wide variety of clients from the local fish and chip shop to legal practices, dealing with the intricacies of Solicitors Accounts Rules before focusing solely on medical partnership accounts and GP finance since 2002. He co-founded YMA with David Johnson in 2011.

Outside work interests include walking, travel, the natural world, gastronomy and most sports.

Mike Harrison
0113 831 4772
[email protected]
ACCA qualified in 1996 and became an FCCA in 2002. Joined Yorkshire Medical Accountants in April 2013

Mike is our corporate accounts manager who also deals with VAT registered GP dispensing practices. He has over 30 years’ experience in public practice as well as 3 years in industry at a national plant hire company. During his career he has dealt with a huge range of businesses in all industries from sole traders turning over £15,000 per annum, through partnerships and limited liability partnerships to both private and public limited companies with turnovers in excess of £15,000,000.

Outside work his interests include spending quality time with his wife and son, music of many genres, reading, motorcycle road racing – especially The Isle of Man TT races and walking.

Bernie Wilson
0113 831 4773
[email protected]
Joined Yorkshire Medical Accountants October 2015

Bernie trained at a long established firm of accountants in Bradford before spending 10 years at Riley and Co chartered accountants. Bernie became AAT qualified at Riley and Co gaining a vast knowledge of sole traders, partnerships and Limited companies.

Outside work she has played in various brass bands, performing at prestigious venues including the Royal Albert Hall and the Houses of Parliament.

Max Johnson
0113 831 4774
[email protected]
Joined Yorkshire Medical Accountants in September 2017 and qualified ACA in January 2021

Max graduated from the University of Nottingham in 2016 with a 2:1 qualification in BSc Hons Management. Max became a Chartered Accountant in January 2021 after completing his journey with the ACA.

Outside work he is a keen sportsman and endures the up and downs of having a season ticket at Leeds United. Max is also a keen traveller and enjoys exploring the world.

Nicola Costello
0113 236 2969
[email protected]
Joined Yorkshire Medical Accountants in November 2019

Before joining the team to help our GP practice clients by maintaining their financial books and records; Nicola worked in general practice as a practice manager. She has over 30 years of experience working in general practice.

Outside work, Nicola enjoys spending time with family, gardening and cooking.

Tax Team

Ann Young
0113 831 4776
[email protected]
Joined Yorkshire Medical Accountants in March 2019 

Ann worked in HMRC until 1992 when she joined Sandison Easson and Gordon. She has over 20 years’ experience in the medical field working in various tax roles.

Simon Blackwell
0113 831 4776
[email protected]
Joined Yorkshire Medical Accountants in June 2020

Simon worked for HMRC in West London from 1976 to 1988 following which he moved to Gloucestershire, where he worked for two accountancy firms up to 2015. He then moved to Leeds and after working for Leon and Company for five years, he joined Yorkshire Medical Accountants. Simon has extensive taxation experience including in the specialised field of trusts.

Outside of work, Simon enjoys spending quality time with his wife Ruth and his two daughters, walking, reading, listening to music and is a keen follower of both Brentford FC and Leeds United.

Meet the Team