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Health & Safety is our priority, ensuring we are up to date with our various accreditation is vital.


We are construction partners who are passionate about what we do and our partners’ success. We pride ourselves in being solution providers. We connect expertise across services, markets, and geographies to deliver transformative outcomes. Worldwide, we design, build, finance, operate and manage projects and programs that unlock opportunities, protect our environment and improve people’s lives.


Castle Kelly Utilities Ltd are pleased to announce that the company is now certified by Achilles, the world’s leading supplier of information management systems.

This certification highlights Silixa’s commitment to quality, offers assurance of pre-qualification to all existing and future clients, and gives access to new business opportunities in global networks.


Castle Kelly Utilities Ltd, are please to confirm that we are Acclaim certified.

Acclaim Accreditation is a new health and safety assessment scheme provided by Capita Property and Infrastructure, exclusive to Constructionline members. This now enables contractors, sub-contractors and material suppliers to get health & safety assessed as a part of your Constructionline membership – saving you from duplication.


The National Electricity Registration Scheme (NERS) has been developed to allow providers (commonly known as independent connections providers) to carry our contestable connection work. Any provider wishing to carry out this work within the contestable market, as defined by OFGEM, must be accredited under this scheme.

The scheme represents part of an ongoing process to introduce competition into the electrical services market.


Constructionline is the UK’s leading procurement and supply chain management service that collects, assesses and monitors standard company information through a question set that is aligned to PAS 91, the standardised pre-qualification questionnaire developed by BSI to reduce duplication within the construction industry.