be warned, in 2007 tax bands are to be re evaluated which means that any modifications you make to your house will now mean that they will be subject to affecting your tax band and thus you paying more per year (month)
http://news.bbc.co.uk/1/hi/business/4103708.stm
source BBC news
although they have a point i still think we pay too much tax in this country and i find it wrong in that sense.