Our team : Mitchells Grievson Chartered Accountants, Bishop Auckland, County Durham

Our team


Nigel Rea FCA Director

Joined Mitchells: 1997

Qualifications & Achievements:

A Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW), Nigel is a Director at Mitchells Grievson and plays a significant role in the overall management of the firm.

With extensive experience across all areas of professional practice including: auditing, accounting, taxation, due diligence assignments, and other corporate finance matters, Nigel works with a range of businesses including start ups, SME’s and subsidiaries of multi-national corporations. Nigel also specialises in the healthcare sector, working for a number of dental practices and care homes.

Nigel has a passion for learning and professional development. Within Mitchells Grievson, he manages the firm’s training programme each year, inspiring young talent with a career that has spanned over many years.

Nigel started his accountancy career at Mitchells Grievson in 1997, where he trained and qualified as a Chartered Accountant before quickly progressing to practice partner at the age of 31.

Nigel is married with three sons. In his spare time, he enjoys watching his boys’ various sporting activities and enjoys dining out and home cooking.

Phil Harnby ACA Director

Joined Mitchells: 2018

Qualifications & Achievements:

Phil started his career in accounting over 16 years ago and has worked at various accountancy practices across the North East. He is experienced in dealing with owner managed businesses of a range of sizes with turnovers exceeding £30m.

Prior to joining Mitchells Grievson Phil has been a Director of a large Newcastle based practice specialising in the Healthcare Sector and looking after clients across the UK. Within this role he has specialised in the ever changing environment of the NHS, allowing him to gain invaluable experience in change management and the challenges this brings to clients.

Phil has also presented on financial topics at national events and written for various national publications.

Having previously worked at Mitchells Grievson Phil understands the specific needs their clients have from a firm of Chartered Accountants. From tax and accounting advice, to support around business growth and transition. Phil’s approach has always been to be there for his clients, business never knows what is around the corner and you need the support of a great firm of business advisors to be there for you when they are needed most. Phil’s strengths focus around a can do attitude to provide whatever support his clients need, backed up by a hugely successful team.

Phil spends most of his time looking after his young daughter which certainly keeps him on his toes. He also has an active role as a Trustee / Treasurer for a number of charities on both a regional and national level.


Claire Wilson ACA Associate

Joined Mitchells: 2005

Qualifications & Achievements:

A member of the Association of Accounting Technicians (AAT) and a member of the Institute of Chartered Accountants in England & Wales (ACA).

Claire joined our practice back in 2005. She qualified as a Chartered Accountant in 2011 and progressed to a manager in 2012. She manages a diverse and varied portfolio of clients that operate in a variety of industries including construction, motor, property development and leisure (restaurants, cafes and takeaways). She also manages several corporate clients operating overseas dealing with all VAT and accounting matters.

Claire deals with all areas of audit, accounting, VAT and taxation matters including personal tax, corporate tax and tax planning. As a manager, she focuses on growing and supporting her team to ensure the highest level of service is provided to our clients, whilst maintaining excellent attention to detail.

Claire specialises in statutory audits of our small and medium sized clients and independent examinations for a range of charities, social clubs, working men’s clubs and associations. She is also the firms specialist in the Solicitors Accounts Rules, acting for several clients in that sector.

Claire loves travelling and spending time with family and friends, particularly her 3 young nephews. She is a passionate sports fan and has been to the Olympics, Commonwealths and World Athletics. Claire is also kept busy with her Cockapoo puppy Brian!

Joanna Grievson ACA BA (Hons) Manager

Joined Mitchells: 2009

Qualifications & Achievements:

Jo achieved her Association of Accounting Technicians (AAT) qualification in 2011 and ICAEW Qualification in 2014.

In her role as Accounts Senior, Jo covers a wide range of accounting areas including bookkeeping, vat returns, accounts preparation, corporation tax and personal tax returns.  Jo plays an integral part of training junior members of staff within the team and also trains clients to use Sage for bookkeeping.  Experienced in dealing with various different accounts, Jo works with larger healthcare and construction companies to smaller sole trader shops and Working Men's Clubs.

Outside of work, Jo spends most of her free time with her son Murphy and her family. Jo loves to travel and aims to visit a new destination each year. She also enjoys watching documentaries.

Helen Griffiths MAAT Payroll Manager

Joined Mitchells: 1999

Qualifications & Achievements:

Helen is a member of the Association of Accounting Technicians (AAT).

Helen joined Mitchells Grievson in 1999 as an admin apprentice, then studied for her AAT qualification that she achieved in 2007.

Helen has been involved with payroll since 2000 and deals with the real time affairs of over 150 businesses on a weekly, fortnightly and monthly basis including the Auto Enrolment regulations that all employers must adhere to. As well as payroll, Helen is also involved with the bookkeeping for several clients and regularly provides local businesses with SAGE training.

When Helen is not at work, she can be found playing E Flat Bass with Bearpark & Esh Colliery Band, in her kitchen decorating cakes or making cards. Helen also likes to do her bit for charity by organising various fundraising events.


Hannah Dinsley MAAT Accounts Senior

Joined Mitchells: 2013

Qualifications & Achievements:

Hannah joined Mitchells Grievson in 2013 at 19 years old. She began her AAT apprenticeship and completed it in 2016. Hannah is now studying towards her ACA qualification.

Hannah’s job role includes bookkeeping, VAT Returns, Accounts preparation along with business and personal tax computations for our diverse range of clients. Hannah is also responsible for the training of our junior members of the team and enjoys passing down her knowledge to those following in her footsteps.

In her spare time, Hannah enjoys an active lifestyle by keeping fit at exercise classes. She is also learning how to ski! Other interests include: fashion, shopping and watching films.

Kirsty Macklam MAATAccounts Senior

Joined Mitchells: 2017

Qualifications & Achievements:

Kirsty started working at Mitchells Grievson in August 2017 and has made an instant impact. She has over 4 years experience of working within accounting practices and has excellent knowledge of accounts, tax, VAT, bookkeeping, payroll and auto-enrolment. As an Account Senior her key role is to complete accounts and tax returns for a range of clients from sole traders to limited companies.

Kirsty has achieved her AAT level 4 qualification and is a full member of AAT (Association of Accounting Technicians).

Outside of work Kirsty enjoys keeping fit and active by going to the gym and running. Kirsty is a keen cook and has a creative flare in the kitchen. She also enjoys relaxing with Smudge, the cat, whilst watching TV Box Sets.

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© 2019 Mitchells Grievson Chartered Accountants. All rights reserved.

Mitchells Grievson is a trading name of Mitchells Grievson Limited, a Company registered in England & Wales, Company Number 06527386, Registered Office Kensington House, 3 Kensington, Bishop Auckland, County Durham, DL14 6HX.

Mitchells Grievson Chartered Accountants, Kensington House, 3 Kensington, Bishop Auckland, County Durham DL14 6HX

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