Our Story

The corporate forefathers of EOS were the global pioneers of insulating oil recycling.

British post WW II austerity meant there was no foreign exchange availability for the purchase of new oil. However, aged oil in overloaded transformers needed replacing. The answer was to take the used oil and restore its original properties. As the UK’s leaders in unused oil production, EOS had the facilities and expertise to undertake this seemingly miraculous task.

EOS was established on 1st November 1999, formed as a 50:50 joint venture between the electrical oils businesses Carless Refining & Marketing Ltd and Castrol UK Ltd.

The aim was to create a independent, specialised, stand-alone business to concentrate on this highly specific niche market. Our parent companies were leaders in the fields of automotive, marine and industrial lubricants, commodity solvents and low-volume speciality fuels. There was no natural synergy with the electrical oils business, which is highly technical and service-related. Our independence allows us to concentrate on developing our business to best meet the needs of our customers.

In the early days of EOS, we worked to improve our logistics services as we established our own contract to meet our customers’ stringent requirements. During this time, we also made significant improvements to our product quality as major enhancements were made to the Stanlow reclamation plant. More recently developments have focussed on the Field Services business.

The two former Carless TransVac units were rebuilt and reconfigured in the mid-2000’s and since then, the two former Castrol Ilovacs have been decommissioned and two new, state of the art units constructed. In addition, the fleet has been augmented by two new mobile regeneration modules (MRMs) to add mobile regeneration to our service portfolio.


The EOS team started with just less than twenty five people. Of these, the majority were works-based positions, six were from Field Services and five from Sales. At the time of our initial full independence from our parent companies, we employed another 31 people, excluding the four company directors, two from each joint venture partner.

Despite having grown the range of our services such as on- and off-site oil storage, an expanded TransTest analysis service and the developments within Field Services, we still remain a close-knit team of 35 people.

Much has changed since 1999, in particular there is more competition in the market than ever before. At EOS, we are the leading supplier of electrical insulating oils and associated services throughout the UK and parts of Europe. It is our length, breadth and depth of the expertise we have accumulated through our heritage that makes us the supplier of choice in this field.

Our specialist team has been reconditioning and reclaiming insulating oils for more than 60 years, and in this time has proven to respond to changes in market requirements, be it ensuring compliance with new National or International product Standards or developing plant and procedures for in-situ regeneration. We have always provided for clients, both large and small, with a refined, bespoke solution they can trust.

As a small to medium sized enterprise, EOS is a streamlined, responsive organisation supported by the resources of major international partners. This structure has built the foundations for the current culture at EOS. Our team are innovative experts who have always been great problem solvers, and the first in line to take on a new challenge.

EOS, like its illustrious ancestors, is not a cut-price, budget supplier. It is an underlying principle of our business that we should provide our customers with the highest standards of products and services. Furthermore, we strive to do this in a way that anticipates customer needs and exceeds their expectations. We take our corporate, legal and social obligations seriously and full compliance with all applicable regulations and procedures is a top priority.

Customers choose EOS because of our long-established history of reliable service and quality products. Our clients know they can trust EOS. They rely on us to understand their needs and satisfy them in a most professional manner. This is a position unique to EOS by virtue of our heritage, expertise and resources. EOS is not just ‘in the electrical oils business’, EOS has for many years defined the electrical oils business and continues to do so today. This is achieved by being true to our ethos of fully understanding the customers’ needs and identifying collaboratively the best way to meet them.

As specialists solely in the field of electrical oils and associated services, and by servicing customers throughout the UK and beyond, EOS has a wealth of accumulated knowledge and experience. EOS is staffed by people who are passionate about what they do. Meet the team here.