The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply.Letter from Karen Dunnell, dated October 2008:"As National Statistician I have been asked to reply to your questions asking the Secretary of State for Justice:""1) What the average number of electors in (a) English, (b) Scottish, (c) Welsh and (d) Northern Ireland parliamentary constituencies was in (i) 2001, (ii) 2004 and (iii) 2007 (225861).""2) What the average number of electors in the areas covered by the (a) English, (b) Scottish, (c) Welsh and (d) Northern Ireland parliamentary constituencies which will be in effect at the next general election was in (i) 2001, (ii) 2004 and (iii) 2007 (225862).""Table 1 shows the average number of parliamentary electors in (a) English, (b) Scottish, (c) Welsh and (d) Northern Ireland parliamentary constituencies on existing boundaries for the years requested.""Table 2 shows the figures on boundaries that come into effect at the next General Election. Data on these boundaries were only collected for England and Wales for 2007. For Scotland and Northern Ireland electoral data are available only on existing boundaries." Table 1: Average number of parliamentary electors on existing boundaries 2001 2004 2007 England 70,503 70,026 71,489 Wales 55,892 55,837 56,392 Scotland 55,094 53,581 65,891 Northern Ireland 66,498 58,085 62,241 Table 2: Average number of parliamentary electors on boundaries that come into effect at the next general election 2007 England 70,890 Wales 56,437 Source: Office for National Statistics. General Register Office for Scotland, and Electoral Office for Northern Ireland.