London, 27 September, 2006 – Convergent billing specialist, Cerillion Technologies, has been named one of Britain’ fastest-growing private technology companies in this year’s Sunday Times Microsoft Tech Track 100:- a league table, ranking companies by sales growth over the period 2003-2005. Cerillion, whose sales increased by 42 per cent a year from £6.3 million in 2003 to £12.7 million in 2005, achieved 90th place on the list.