69. Viadex - £26.1m

The Surbiton-based VAR is more than £10m bigger than last year, as it claims it benefited in its last fiscal year from a heightened focus on core markets and providing more products and services to its base of key accounts. Profit before tax stood at £750,000 and the business is investing in a three-year growth plan, including increasing its sales headcount by 50 per cent last year.