The information requested is published quarterly in Quarterly Energy Prices, available online at:
http://www.berr.gov.uk/whatwedo/energy/statistics/publications/prices/index.html
The latest edition from September 2008 shows that as at the end of June 2008, there were approximately 3.9 million electricity prepayment customers and 2.4 million gas prepayment customers.
This publication also holds provisional 2008 yearly bills, based on standard consumption figures of 3,300 kWh for electricity and 18,000 kWh for gas. The following is taken from tables 2.2.1 and 2.3.1.
£ Prepayment Direct debit Gas 630 528 Electricity 419 374
The Office of Gas and Electricity Markets (Ofgem) collects and publishes data about the recalibration of token prepayment meters. These meters have to be individually recalibrated after each price change. From December 2006 to June 2007, the last period for which data have been published, the number of token prepayment meters in Great Britain awaiting recalibration for those suppliers who apply the price change in advance of recalibration is:
Number December 2006 409,000 January 2007 256,000 February 2007 196,481 March 2007 153,638 April 2007 128,097 May 2007 107,790 June 2007 1119,684 1 Inaccurate data was reported for May 2007 and therefore correct figure as at end of June 2007 is higher than that reported in May.
Suppliers are working on accelerated replacement programmes to replace token prepayment meters with newer technology key meters which can be recalibrated remotely.