Meet the Team



Aged 14, Mario showed a natural aptitude for enterprise while still at school, working alongside his father in the family property and catering business, he gained invaluable life skills and experience, which played an instrumental part in his later success. Mario acquired and developed his first property aged 18, from his own savings. He used the experience to expand his skills in planning, construction and housing, and over the years developed a strong contact book in the property and banking sectors. Over the past 25 years Mario has continued to run several successful property businesses and he has generated a substantial self-made portfolio. Mario has fine tuned the ability to source an opportunity and to see it's as yet unapparent value, making him a true entrepreneur.

In 2009, following the recession, Mario founded Caridon Property, having identified a gap in the market to assist individuals hit by the economic downturn. Using his acquired knowledge and experience as a landlord, he pioneered one of the first rent guarantee schemes in London, assuring a reliable income for landlords and acting as a guarantor for vulnerable tenants who were struggling to find accommodation. Caridon Property has grown rapidly and is now part of the award-winning Caridon Group, a multi-million pound property development and lettings company, dedicated to serving the local communities it operates in.

A highly respected property entrepreneur, industry campaigner and dedicated family man, Mario continues to apply the same hands-on approach and determination to every project he undertakes. His passion towards social responsibility guides the vision of the Caridon Group, which aims to create new opportunities and fairer housing for all.

His motto is “Always lead by example, believe in what you do and why you do it! ”.



Abbas grew up in an entrepreneurial family and graduated with a BA Hons in Accountancy and Finance in 2001. Within two years of graduation he had sold his first successful business for a profit. After his short career in accounting, Abbas sought a broader challenge that could fulfil his appetite for growth and success. He moved into property management and grew his business, eventually managing 150 properties and employing seven portfolio managers.

Abbas joined Mario at Caridon in 2009 where he took a fundamental role in re-structuring the business and developing the pioneering concept of guaranteed rent.

Abbas's expertise includes management, negotiation, financial structuring and due diligence. He oversees the financial growth and operations of all the Group’s companies.

ROY LEDGISTER (Barrister) Group Executive Chairman


Roy is a qualified barrister with expertise in strategic legal and commercial advice across a range of sectors including telecoms, agriculture, property and pharmaceuticals. He set his own law firm up in 1998 working in both criminal and commercial law. He crossed to the Bar in 2001 and has been counsel to a diverse portfolio of clients and individuals including political groups and politicians, banking groups and media companies.

He guides and develops investment at Caridon and has played a key role in securing conditions for the expansion of the group.

SHERRELLE COLLMAN Commercial Business Director


Sherrelle joined Caridon Property Services in 2009 as a senior portfolio manager having previously worked as a housing coordinator for a registered charity.

After six years with Caridon Property Services she became Commercial Business Director at CLS and has been instrumental in developing the company’s overall commercial and communication strategy, whilst driving new business and partnership opportunities.

With her vast experience of the private rented sector and knowledge of housing within the welfare system, Sherrelle has been instrumental in creating the CLS range of services with landlords in mind.

A senior negotiator and decision maker, Sherrelle is well respected in the property sector.


Bill Irvine started his career in accountancy in the private sector. He then moved into local government and studied Public Administration & Administrative Law, specialising in adminstraive tribunals. He quickly became known as a very effective Welfare Rights Advocate. Later he became Head of Revenues, Benefits & Advice services at one of the UK’s largest councils. He was COSLA's representative to the DWP HB Standing Committee, Westminster. He left local Government in 2001 moving back into the private sector as MD of a Credit Management company specialising in the social sector. He did some voluntary Board Membership at SFHA and Trust HA Ltd until in May 2012 he decided to start offering his consultancy services to private & social landlords on a commercial footing.

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