41. Bell Microsystems - £51.3m

Last year was a barnstormer for the Portsmouth-based VAR, with sales rising by almost three quarters and a six-figure loss turned into a seven-figure profit. The company increased its top line from £29.4m in FY10 to £51.3m the following year. Meanwhile, an operating loss of £539,175 turned into a profit of £1.1m. Core vendor partners for the firm include IBM, Symantec, Oracle, HP and Dell. The firm also offers lifecycle management services including WEEE disposal of unwanted IT.