Found this on the "Tax Credit Scandal Blog" - which is independent of us (author unknown - I think (s)he prefers it that way), and thought the alphabetical list of MPs and their contact details could come in useful for our members:
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Please involve your MP in your dispute and the wider issue of the failings of this system, in this run-up to the election! Get them working for you, and for us!
Morpheus: I'm trying to free your mind, Neo. But I can only show you the door. You're the one that has to walk through it.