From Prof David Mackay's web page: How to avoid paying for war

This page was on Prof Mackay's website  in 2007 - prominently linked from his home page.

The full text is as follows:

Peace Tax Return Declare your conscientious objection to paying taxes for war with the new 2005 Peace Tax Return It is not an official Inland Revenue form but we believe it should be one page of the official Inland Revenue Tax Return - we've even designed it for them! If you object you should make a declaration every financial year by completeing a Peace Tax Return. Print it out, fill it in and post it today. Download a 2005 Peace Tax Return (290k) Also available in Welsh. This form is for anyone with a moral or religious objection to military spending, on grounds of conscience, who wishes to declare their objection to the UK Government. It is suitable for employed and unemployed people, students, pensioners, in fact everyone who objects to paying for war. Everyone pays tax - VAT, fuel/alcohol/tobacco/vehicle tax as well as income tax etc.- so anyone can complete a Peace Tax Return who objects to paying for the military on grounds of conscience. If you object, download a PTR now and tell the Government how you feel. A PTR is a one-page form which we believe should be just one page of the official Inland Revenue Tax Return. Many people in the UK already complete an official Tax Return from Inland Revenue - usually the self-employed and people who have some taxable earnings not already taxed at source via PAYE. Conscientious objectors to war should be able to legally declare their objection to paying tax for military purposes in their Tax Return. Their tax code should then be altered to reflect this and they would be secure in the knowledge that Inland Revenue will divert the percentage of tax that they usually pay to the military to a Non-Military Security Fund instead. conscience believes that this system is not too taxing for Inland Revenue to manage and nedd not be expensive to administer. How to fill in your Peace Tax Return Download the PTR. The form is in two parts - Part A and Part B. You should complete EITHER Part A OR Part B. Instructions for Part A Part A is for those people who are taxed at source (i.e. those people who do not complete a Tax Return from Inland Revenue). If you pay income tax under the PAYE system, or pay no income tax at all because you are unemployed, you should complete this part. Part A is also for those people whose income tax is self-assessed (i.e. those people who do complete a Tax Return from Inland Revenue) but do not wish to try to withhold or divert the part of their taxes that contribute to military spending. After signing and dating the declaration in Part A you should post the form to: Paymaster General, HM Treasury, 1 Horse Guards Road, London, SW1A 2HQ. Instructions for Part B Part B is for those people whose tax is self-assessed (i.e. those people who complete a Tax Return from Inland Revenue) and whose conscience directs them to withhold or divert the part of their taxes that contribute to military spending. Please note that withholding or diverting taxes due is likely to incur financial costs and may result in legal action being taken against you. To make the Peace Tax Return a formal part of your official Inland Revenue Tax Return you should make reference to your declaration of conscientious objection in the 'Additional information' box on Page 9 of your Inland Revenue Tax Return by inserting the words "Please see attached declaration of conscientious objection to military taxes" or similar. After signing and dating the declaration in Part B you should post the form to your tax office with your Inland Revenue Tax Return. Download a 2005 Peace Tax Return (290k) - print it out, fill it in and post it today. Also available in Welsh.