38. Scan Computers - £55.6m

The Bolton-based retailer and VAR grew turnover by almost 14 per cent as it coasted through the £50m sales barrier in FY11. The company also enjoyed a more-than-tenfold increase in operating margins, as profit grew to almost £1m. The amount of turnover per employee also grew by more than £1,500 and stood at £383,530 for the 2011 fiscal year. The firm sells to businesses and consumers online and through a retail store in Horwich.