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Supervision Assured Ltd was established in 1975 as an office and window cleaning company.

In 2000 the management team reviewed the services provided and identified a need to provide a dedicated operation for the window and cladding cleaning functions and so Supervision Assured Ltd divided into Supervision Assured Ltd T/A 24Seven Group and Supervision Assured 2000 Ltd. Both companies still work alongside each other to provide a complete solution to our customers cleaning requirements.