MySociety are going hell for leather to campaign against recent moves to block public disclosure of MPs expenses. Here's the letter I wrote to my MP in support:

I am writing to you in order to voice my concerns over the recent proposals to conceal MP's expenses.

These proposals are a step backwards, and make MP's the only category of paid public official who do not have to disclose their expenses fully. What argument can realistically be made to conceal MP's expenses?

It cannot be said that the obligation is too onerous. Afterall, the same parliament expects all self employed people to keep detailed records of expenses going back five years in order to complete their self assessment forms.

It cannot be because the expenses would produce a media circus. Afterall MSPs seem to manage to report their expenses, and the only media interest that is generated is when expenses are deemed excessive. Surely this is entirely as it should be?

It cannot be due to the cost. Afterall, £1million of public money has already been invested in the process of making these very expenses public. If the proposals to conceal MP's expenses are passed by the house then this £1million of public money will be wasted.

It is only self interest on the part of MP's that drives this proposal. For this reason, I am delighted to read that non profit organisation MySociety will be permanently recording which MP's vote for this retrograde concealment measure and publicising it accordingly. I wonder how many of your constituents will learn about your activities via their fantastic websites between now and the next election?

The only way to tackle cynicism about the political process is to open it up and strive to improve transparency. MP's expenses are a key part of this. I hope that you use your influence and your vote to support moves to increase transparency in Westminster, rather than working against it.

There's a Facebook group you can join too: http://tinyurl.com/8lz4gl

There's only a few days left to get the message over to your MP.