Why WFL?

Welcome to William Farrell Ltd.

WFL is an engineering solutions contractor specialising in the commercial, industrial, medical, hospitality and educational sectors. The services WFL provide range from full ‘design and build’ turnkey packages to installation, fit-out, maintenance and 24 hour on-call services.

WFL’s commitment to continued excellence is evidenced by our long-term clients, including major blue-chip and Fortune 500 companies, who value our professionalism, quality, and value.With in-house design, BIM and estimation facilities we are in a position to meet our clients exact specifications and requirements – from the original concept stage, to design stage, then engineering stage, through procurement, to construction and maintenance – with a strong focus on value.


From small beginnings WFL has thrived over many years to become a significant and trusted provider in the engineering facilities industry. Over the years WFL have maintained a core team of staff in whom we invest heavily in training and education to ensure that our service is both technically advanced and consistent. WFL are members of the Construction Industry Federation (CIF), the Register of Electrical Contractors (RECI), the Association of Electrical Contractors (AECI) and the Construction Employers Federation (CEF). WFL holds NSAI certification in Health & Safety (OHSAS 18001), Environment (I.S EN ISO 14001) and Quality (I.S EN ISO 9001).

Over a period of 35 years in business, WFL has built up a reputation as one of the most reliable and consistent companies in the industry.

William Farrell Limited was established in 1985 by former MD Billy Farrell.

Billy built WFL through the years into an extremely successful and well respected business within the industry, and in 2010 he decided to implement a succession plan for the business.

In March 2010 Derek Murphy and Mike Farrell were appointed as directors and became shareholders of WFL, their goal was to grow WFL over the following 9 year period, gradually take over all responsibilities within the business with Billy in a supporting role, and then take over the business upon Billy’s retirement which they achieved in May 2019.

WFL is now owned by current Managing Director Mike Farrell and Director Derek Murphy.

WFL is currently in a period of growth and is now operating in the tier one category of the construction industry. Mike and Derek are committed to further growing the business and maintaining the success and ethos  established by Billy Farrell in 1985.

Maintenance Division

Allied to the installation side of the business is a strong maintenance division that provides excellent after care cover, planned preventative maintenance and 24 hour call out service to many clients. Through these maintenance contracts WFL builds strong client relationships ensuring that their electrical system is fully operational and capable of maintaining power and performance to the building and associated equipment to avoid any downtime in production or service. Our maintenance services range from ad-hoc maintenance and repairs, to full planned preventative maintenance systems. We also offer 24 hour on-call emergency cover, hire of labour and supply of maintenance personnel. Through our experience within this area, we can offer advice on maintenance procedures, budget costing, and a trusted opinion on what’s best for the client. Furthermore WFL’s maintenance division includes Portable Appliance Testing, Emergency Lighting and Fire Alarm testing, Thermal Imaging, electrical services audits and associated reports, RECI certification among a host of other services.

& Certification

ISO 9001:2015 Certificate of Registration

William Farrell Limited's Certificate of Registration of Quality Management System to ISO 9001:2015 Standards.


ISO 14001:2015 Certificate of Registration

William Farrell Limited's Certificate of Registration of Environmental Management System to ISO 14001:2015 Standards.


OHSAS 18001:2007 Certificate of Registration

William Farrell Limited's Certificate of Registration of Occupational Health & Safety Management System to OHSAS 18001:2007 Standards.


OHSAS 18001:2007 Health & Safety Policy

William Farrell Limited's Health and Safety Policy in accordance with OHSAS 18001:2007.


ISO 14001:2015 Environmental Policy

William Farrell Limited's Environmental Policy in accordance with ISO 14001:2015.


ISO 9001:2015 Quality Policy

William Farrell Limited's Quality Policy in accordance with ISO 9001:2015.


Insurance Document 2018-2019

William Farrell Limited
Public & Employers Liability Insurance and Annual Contractors All Risks Insurance.


H&S Statement & Policy 2018/19

The Company Safety Manual is based on a hazard identification and risk assessment of all work areas, in which the employees and subcontractors of the company operate.


associations & accreditations