Our Trustees bring a wide range of specialist skills and experience to Catalyst  – currently their expertise covers Finance, HR, Communications, Law, Security, Domestic Abuse and the NHS.

  • Christopher Critchlow

    His Honour Christopher Critchlow DL is a former barrister and Circuit Judge who was the senior Judge at Guildford Crown Court 2008-16 and the Honorary Recorder of Guildford. He and his wife Wendy have lived in Surrey since 1980 and he is a Deputy Lieutenant of the county who was High Sheriff of Surrey 2022/23.  On behalf of the Lord Lieutenant he chairs a Focus Group on Domestic Abuse. He is a trustee of Surrey Clubs for Young Persons, Painshill Park and the High Sheriff Youth Awards and was a governor of Guildford RGS for many years. He is delighted to have become the Patron of Catalyst and will give the charity his full support.

  • Warren Rockett

    Warren was security and crisis management advisor to businesses and business leaders having spent a number of years as the Global Security Head for a major international industrial company. Previously he was a Surrey Detective Superintendent. During his long police career he led on drug partnership initiatives and was a member of the Surrey Drug Action Team, chairing its Drugs Availability Sub Committee.

  • Kath Mills
    Deputy Chair

    Kath is currently working as interim Director of Communications & Marketing at a military charity. She has previously held similar roles in higher education and a variety of charities, primarily focused on children, young people and family welfare. Kath has been supporting Catalyst in this area since she became a trustee in 2010. She became Deputy Chair of Trustees in June 2020.

  • Roger Drennan
    Chair of Finance Group

    Roger graduated LL.B (hons) and worked as a solicitor in his native New Zealand focussing on commercial and company law before settling in the UK in 1984.  After a stint with a London firm of accountants he set up his own financial management consultancy  and went on to become Financial Director of a group of UK companies with interests in the USA and abroad. He is experienced in a range of governance and compliance issues and is Chair for the the Catalyst Finance, Remuneration and Investments committee.

  • Kim Tinneny

    I first became aware of Catalyst in 2008 as a client of several of their services.  After being able to move my own life forward, I returned as a volunteer peer mentor for a year, to try and help others in a similar situation. then moved into paid work within the supported housing sector, and now manage a homeless hostel in Guildford. I was previously on the board for a large national Housing Association but felt it was too corporate for me, so decided to focus my energies on something a bit closer to my heart. I feel extremely privileged to be able to sit on the board of the organisation which played such a big part in my own recovery.

  • Chisha McDonald

    Chisha has held senior management roles in the NHS both within pharmacy and outside pharmacy working in commissioning and leading on high level change programs around demand management and service redesign. Chisha has worked closely with the South London Mental Health Trust which really sparked her interest in Mental Health and was involved in the work they did around improving patient experience.


  • Ewan Henniker-Smith

    Ewan has worked in senior leadership roles across a variety of industries, working on people and culture, and leading change initiatives. He brings a depth of Human Resources experience, with particular specialist skills in strategic planning, resourcing and talent management.

  • Sarbani Bose

    Sarbani is the Founder Director of the data consultancy firm Ei Square with 20 years’ in digital transformation, especially around data and analytics. She recently graduated from the University of Oxford, Said Business School Artificial Intelligence Programme. Her  experience around data and data strategy assisted organisations within telecommunications, construction, and investment banking. She is also the diversity and Inclusion ambassador for the Institute of Directors in Hampshire and Isle of Wight.


  • Rebekka Roberts

    Rebekka is a trained coach and mentor, currently working in public engagement for a Surrey-based NHS organisation with considerable experience in the health and social care sector, including an organisation designing training and conferences for the health and social care sector. She brings a wealth of workplace wellbeing, inclusion, and compassionate everyday leadership experience, and an in-depth understanding of how the healthcare system is delivered, as well as personal experience of mental health, to the Trustee Board.

  • Darren Garland-Bonner
    Associate Trustee

    Darren is an established HR professional, having worked in several well-known corporate and not-for-profit organisations. Darren is a Charted Fellow of the Chartered Institute of Personnel Development and has worked in a number of Senior HR Positions over his career to date.

    He has been a Trustee and Chairperson of Outline, Surrey’s Sexuality and Gender identify support charity for over 10 years, which we are in the process of integrating into being a Catalyst Support service. He will act as an advisor to the Board on the integration of the two charities and working with Sexuality and Gender identity related communities in Surrey.  Darren’s pronouns are he/his/him.


                                                    Nick receiving the Sue Bowen award in 2022                                                                    


Catalyst Board of Trustees supports the Charity Governance Code

Catalyst Board of Trustees adopted the new Charity Governance Code in 2019.  As part of the adoption process the trustees have been assessing the Trustee Board and the charity against all the 75 good practice components that make up the full Code.

Trustee Warren Rockett said “Catalyst has high standards where governance is concerned. But we are not complacent and we welcome this new Code against which we have already started to benchmark ourselves. In all the critical areas the charity and its Board already substantially meets the requirements of the Code.”

The Code is not a legal or regulatory requirement but it sets down the 7 principals and the recommended practices for good governance. Catalyst will publish in its annual report an update on how we have used the Code to ensure we deliver good governance.

The 7 principles in the Code are:

  1. Organisational – ensuring the charity’s aims are being delivered effectively and sustainably
  2. Leadership – is strategic, effective and in line with the charity’s aims and values
  3. Integrity – adopting values and creating a culture that inspires public’s confidence and trust in the charity
  4. Decision-making, risk and control systems and processes are in place and are monitored
  5. Board effectiveness is demonstrated by using the appropriate balance of skills, experience, backgrounds and knowledge to make informed decisions
  6. Diversity in its widest sense – the Board’s approach supports its effectiveness, leadership and decision-making
  7. Openness and accountability – the Board leads the organisation in being transparent and accountable

The full Code can be downloaded at: