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Circle Control & Design Systems Ltd

Established in 1995 and work exclusively within the utilities industry as specialist LV electrical contractors

We have been a dynamic force providing LV electrical installation for many clients within the utility and renewable energy industry for the past 29 years helping to develop solutions and achieve goals safely, within budget and on time.

As electrical contractors we offer, LV Installation works, SWA Cabling, Containment, Instrumentation, Distribution Systems, Control Stations, Building Services, Internal and External Lighting, Fibre Optic, Profibus, Lightning Protection services, Compex works and much more…. with key personnel all CSCS/ECS and EUSR trained, Confined Space, Asbestos Awareness, Compex, Face-Fit trainers, First Aid, PASMA and IPAF

We currently hold the following accreditation:

ISO 9001:2015
NICEIC Approved Contractor
ComPex Trained Staff
Achilles UVDB Registration

LV Installation works
SWA Cabling
Containment
Instrumentation
Building Services
Fibre Optic
Profibus
Lightning protection services
CompEx works
much more….

Dearne Reach Integrated Constructed Wetland (2025)

Delivering a first-of-its-kind low-carbon stormwater management solution in Yorkshire

Dewsbury WwTW (2025)

New 45m diameter primary settlement tanks to meet predicted population growth and ferric dosing for phosphorus removal to ensure compliance

Killinghall STW (2025)

Achieving phosphorus reduction and capacity expansion

Knostrop STW (2025)

Enhanced biological phosphorus and tertiary solids removal plants achieve tightened WFD consents with reduced energy consumption

Don Regulators (2024)

Flood risk reduction and improved fish migration across the River Rother catchment with online flood gates and a bespoke full-channel fish pass

Embsay WTW (2024)

Embsay Water Treatment Works is a standalone 24 ML/d water treatment works operated by Yorkshire Water (YW) and located in the Yorkshire Dales National Park, providing clean water to over 15,000 people in Skipton and surrounding areas. The existing works comprises of clarifiers, rapid gravity filters and a chlorine contact tank with associated chemical dosing. […]

Esholt STW (2024)

Fulfilling the Water Industry National Environmental Programme to reduce overall phosphorus in our rivers

Holderness Flood Alleviation Scheme (2024)

Design and construction of new ‘online’ pumping station and flood storage aquagreen to improve resilience in the Humber region

Red Doles CSO (2024)

The Red Doles Combined Sewer Overflow (CSO) neighbours the Huddersfield Broad Canal and a Network Rail bridge. The CSO serves a catchment covering approximately 3.8km2, predominantly consisting of residential properties and accommodating around 8512 people. The majority of the Fartown area of Huddersfield drainage operates as a combined system, with Red Doles receiving flows from […]

Knostrop STW (2023)

Knostrop Sewage Treatment Works (STW) is Yorkshire Water’s largest wastewater treatment site, serving a population equivalent of 990,000 and a full flow to treatment (FFT) of 5600 l/s. The WINEP Programme requires Yorkshire Water (YW) to achieve compliance with the new Total Phosphorus and Total Iron permit levels at 80 wastewater treatment works, including Knostrop. […]

Hull WwTW - Project Update (2021)

Located in Saltend, Yorkshire Water’s Hull WwTW provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. This case study follows on from an initial paper in 2020 and details the progress of the new inlet works and the refurbishment […]

South Ferriby Flood Alleviation Scheme (2021)

South Ferriby lies on the south bank of the Humber Estuary, approximately 12 miles from Hull. During a tidal surge in December 2013, the existing flood embankments were inundated causing £50m worth of damage by flooding 129 properties, the CEMEX cement plant, 500 hectares of agricultural land and the A1077. Residents were left fearing for […]

Hookstone Road CSO (2020)

Hookstone Road CSO in Harrogate, North Yorkshire, is a CSO chamber with upstream and downstream online storage provided by large diameter pipes. During storm events, pass forward flow is restricted by the 200mm outlet pipe and 90 degree bend downstream and partially fills the storage pipes before excess flows pass through a screen at the […]

Hull WwTW (2020)

Hull WwTW located at Saltend, east of Hull, provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. The existing treatment works was built over 20 years ago and required some specific upgrading and refurbishment. The primary drivers for the […]

Langsett WTW (2020)

Yorkshire Water’s Langsett Water Treatment Works (WTW) is located 17km north-west of Sheffield in South Yorkshire, on the edge of the Peak District National Park. The WTW treats raw water which is extracted by gravity from two upland impounding reservoirs at Langsett (adjacent to the WTW) and nearby Midhope (approximately 1km south-east of the site). […]

Stocksbridge WwTW (2019)

Stocksbridge WwTW is located in the village of Deepcar on the outskirts of Stocksbridge, approximately 7km northwest of Sheffield city centre. It currently serves a population of 13,000, but this is expected to grow towards 15,000 by 2030. Major housing development is ongoing near the existing works, and as part of this Yorkshire Water reached […]

Rivelin WTW - Sirofloc Replacement: Part 2 (2018)

Yorkshire Water Services (YWS) committed to the Drinking Water Inspectorate’s (DWI) compliance date of 31 December 2017 for beneficial completion of a new clarification process at Rivelin WTW. The £25m scheme required the design and construction of a large 82.5MLD buried treatment plant (80m long, 40m wide and 14m high) on the border of the […]

Station Road (Queensbury) Sewer Flooding (2018)

Mott MacDonald Bentley (MMB) carried out an investigation for Yorkshire Water Services into the flooding of five properties in Queensbury in West Yorkshire during periods of heavy rainfall. The investigation concluded that the combined sewer system in the residential cul-de-sac had insufficient capacity during a 1 in 10-year storm return event, resulting in overland flow […]

Flamborough Head Sewage Pumping Station (2017)

The Flamborough Head Sewage Pumping Station (SPS) is located close to a scheduled monument, a Site of Special Scientific Interest, within a local nature reserve, adjacent to a Special Area of Conservation and Special Protection Area and is home to guillemots, puffins, dolphins and porpoises. The area is also a major tourist attraction, enticing thousands […]

Saltend WwTW (2017)

Yorkshire Water’s Saltend WwTW had a history of environmental under-performance which resulted in a significant number of customer complaints due to odour. Between September 2015 and May 2016, £18m of refurbishment and upgrade work was carried out on a fast track basis to improve this performance. Commercial arrangements were adjusted from normal framework conditions to […]

Rivelin WTW - Sirofloc Replacement: Part 1 (2016)

Rivelin WTW provides drinking water for a population of approximately 200,000 in Sheffield. The raw water feeding the works is a blend of water from the Derwent Valley via Ladybower Reservoir and the local catchment via Rivelin Reservoir. The quality of the raw water has deteriorated in the period since the current plant was built […]

Wetherby STW (2016)

Wetherby STW is the wastewater treatment facility for the market town of Wetherby and its surrounding area. It has a population of approximately 23,000 people and is mainly unaffected by seasonal variations other than the local Wetherby Race Course. As there is no direct connection from the racecourse to the sewage treatment works, all racecourse […]

Empower Partners with Leading Electrical Engineering Firm, Circle Control & Design Systems

Empower is proud to announce its inaugural strategic partnership with Circle, a leading electrical engineering company specialising in the water sector. With a 30 year legacy of delivering large-scale infrastructure projects alongside Tier 1 contractors, Circle brings deep industry expertise and a skilled 35-strong workforce, operating across Yorkshire and surrounding regions. This partnership marks a […]