(2) what recent estimate he has made of the cost to the public purse of the temporary increase in stamp duty thresholds; and how it will be financed.
The estimated cost of the stamp duty holiday was published at the pre-Budget report, which can be accessed here:
The funding of this is not hypothecated to a particular source of revenue. The holiday is due to end at midnight on 3 September 2009.
(2) if he will bring forward proposals to allow house purchasers to pay stamp duty only on the proportion of the house not in their ownership under shared purchaser arrangements.