I refer the hon. Member for Bromley and Chislehurst to the answer given on 26 October 2009, Official Report, column 142W.
The total number of notification changes from 1 April 2009 to 11 February 2010 with code CL26 was 29,572 representing 0.1 per cent. of the dwellings in valuation lists for England and Wales.
This information cannot be provided other than at disproportionate cost. Although all changes to council tax bands are entered on the Valuation Office Agency's (VOA's) computer system, this cannot be interrogated to establish the precise reasons why a change in council tax band has occurred. The reasons can only be established by examining each record in turn.