15. Logicalis - £187m

The integrator’s revenue is more-or-less flat on last year, with EBIT taking a slight hit. But the firm has banked on future growth and increased profitability through the hefty investments it has made in its credentials as a cloud provider. A dedicated cloud division was launched in 2009. The following year Logicalis opened a £7.5m 10,000sq ft datacentre to support its ambitions.