§ Mr. George Howarth
To ask the Chancellor of the Exchequer (1) what estimate he has made of the additional revenue which would be raised from a 1p increase in(a) the standard rate of income tax and (b) the higher rate of income tax; 
(2) what estimate he has made of the additional revenue which a higher rate of income tax of 50 per cent. would produce. 
§ Dawn Primarolo
I refer my hon. Friend to the publication "Tax ready reckoner and tax reliefs December 2003" on the Treasury website: http://www.hm-treasury.gov.uk/media//AAB247pbr03_trr.pdf. The figures exclude any estimate of behavioural response to the tax change.