Revenue: £64.2m (+13%)
Net profit margin: -1.7% Staff: 410
A lack of available fresh accounts mean that we have had to recycle last year's numbers for this audiovisual integrator, which logged revenues of £64.2m in the year to 30 June 2018. The Sunbury-on-Thames-based business last year acquired £14m-revenue rival Focus 21. Installing a media wall for Conde Naste's new international offices is among the case studies touted on its website.