Estimates of the numbers, disposal value and gains made on assets disposed of in financial year 2003-04 by type of asset, including residential property, are available in National Statistics table 14.4 on the HM Revenue and Customs website at:
http://www.hmrc.gov.uk/stats/capital_gains/menu.htm
Estimates of the revenue impact of charging capital gains tax on residential property owned by non-domiciled and non-resident individuals are not available.