If the retail price index inflation in September 2009 is negative it will have a reducing impact on the multiplier for 2010-11.
The Department does not collect this information, as businesses within the BID area decide on the amount of the levy and vote in a ballot on whether the scheme should go ahead. The size and calculation of the BID levy varies widely between BIDs. The levy is collected by the billing authority and held in a separate BIDs Revenue Account where it is ring-fenced and can only be used for the BID.
For England, I refer the hon. Member to the answer I gave the hon. Member for Bromley and Chislehurst (Robert Neill) on 19 January 2009, Official Report, column 1081W.
Business rates in Wales are the responsibility of the Welsh Assembly Government.