This Slough-based engineering firm was able to use offsite prefabrication to compensate for the impact of the pandemic on its onsite operations. Specialising in mechanical, electrical and plumbing work, it has completed more than 4,000 projects since it was founded in 1986, including pipework for two huge London projects: the redevelopment of Battersea power station and 100 Bishopsgate. Michael Hoodless, 61, and Gary Herbert, 58, run the company, which last year acquired Midlands firm E7 Building Services.