The Insolvency Service does not hold information on business size and, therefore, cannot provide an estimate of the numbers of small businesses entering administration or liquidation since the beginning of 2005.
Total numbers of companies entering liquidation and administration are published quarterly and are available on the Insolvency Service’ website :
http://www.insolvency.gov.uk/otherinformation/statistics/200811/index.htm
(Tables 1 and 3 for England and Wales).