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Sutton & East Surrey Water Plc produces and supplies drinking water. It is a water-only company and supply residents in East Surrey, and parts of West Sussex, west Kent and south London. The company was founded in 1862 and is headquartered in Redhill, the United Kingdom.

Ricardo Rail Ltd. provides business consulting services to the rail industry. range of services to manage safety, as well as the functional and business performance of rail systems. The company provides engineering, safety, risk management, and operations services for the rail industry. It was founded in 2000 and is headquartered in Reading, the United Kingdom.

The Electronics Leadership Council provides electronics and information technology services. The company is headquartered in London, the United Kingdom.

Part of Ricardo Plc, Ricardo-AEA Ltd. is a consulting British company founded in 2012. The company is based in Shoreham-By-Sea, UK and provides consulting services.

Ricardo Innovations Ltd. provides environmental consulting and project management services. The firm offering a comprehensive range of specialist services within the environmental consultancy sector. It provides creative and innovative solutions for clients. The company was founded in 2001 and is headquartered in Manchester, the United Kingdom.

Part of Ricardo Plc, Ricardo Investments Ltd. provides investment services. The company is based in Shoreham By Sea, UK. Founded in 1988.

Part of Ricardo Plc, Ricardo UK Ltd. is a strategic, environmental and engineering consultancy that specializes in the intersection of transport, energy, and climate agendas. The company is based in Shoreham-by-Sea, UK and was founded in 1915 by Harry Ricardo. The British company is also experts in motorsport transmission design and manufacture.