The information requested falls within the responsibility of the UK Statistics Authority. I have asked the Authority to reply.Letter from Karen Dunnell, dated July 2008:"As National Statistician I have been asked to reply to your question asking what the (a) highest, (b) average and (c) lowest percentage of voter registration in local authority areas in England is for the most recent period for which figures are available. (218826)""The closest available approximation to the percentage of voter registration is the number of people who are registered to vote in the local/European elections as a percent of the estimated usually resident population age 18 and over.""The proxy percentages should not be interpreted as the percentage of the eligible population who are registered to vote. They may be an under estimates in some areas because not everyone who is usually resident is entitled to vote, for example foreign citizens from outside of the EU and Commonwealth are not eligible.""Conversely, for other areas rates exceed one hundred per cent as figures for the registered electorate may be inflated. People who have more than one address may register in more than one place (e.g. students may register at parental and term-time addresses) and electoral registration officers vary in how quickly they remove people from the registers after they have moved away from an area or died.""Bearing these caveats in mind the highest, average and lowest percentage of voter registration in local authority areas in England, for 2006, are 101.9%, 96.5% and 68.6% respectively. 2006 is the most recent year that estimates of the usually resident population are available."