Anyway, I got my answer today, post dated late ... my first response from my current MP after five tries ...
12 August 2011
Dear MR xxxxx
Thank you for your recent email regarding the security of census data.
I have immediately written the Cabinet Office on your behalf and, as soon as I receive a reply, I will contact you again.
Thank you for taking time to bring this matter to my attention.
DEBBIE ABRAHAMS MP
Oldham East & Saddelworth.
Three fucking months too late, I get the above half arsed excuse and that's it.
Let's see if anything comes of her investigations ... ?