There are three resources on this page to assist you in writing to your MP, or the Pensions Minister, Steve Webb. They are all downloadable by clicking on the links below, and are in .pdf or Adobe Acrobat format. The intention is that you can download them, and then cut and paste the text you want to use into your own document. The resources are:

Text provided by Gordon Williams of the OPA, incorporating the standard briefing provided by the Government to MPs on the proposed CPI/RPI changes, and Mr Williams' counter-arguments (in Red text). This is worth reading simply for it's clarity.
Suggested draft text for a letter to your MP
Suggested draft text for a card to Steve Webb, the Pensions Minister. There may be more text than you could write on a postcard, so select your own key points