Thanks, just sent one. Here is my letter if anyone else wishes to use bits of it:
Dear [my MP],
I am writing regarding the Draft Communications Data Bill (aka the Snooper's Charter).
I find it extremely worrying that the government sees fit to retain the private actions of individual citizens, of whom no wrongdoing is suspected, in such a way.
I have several concerns, which I do not believe have been addressed:
Firstly, retaining this sort of information on every single citizen effectively allows the government to build a profile of all of one's public and private life. All interests, all social interactions, all news and media and all searches, allow a very detailed profile to be built up. This would expose both public and private communications and interactions in a way which raises very serious privacy concerns. Far from playing "catch up" with technological developments, as the government has presented this bill, this is a vast and far-reaching new power, which has never before been available.
Secondly, this data will be stored on databases managed by private companies, who have no real incentive to keep it secure. Encrypting is not mandated by the bill. As evidenced by the recent Talk Talk and Ashley Madison leaks, no data kept in a connected database can ever be 100% secure, and databases like this, spread between many different private entities working on lowest-cost platforms, will be a prime target for attack. This data will, at some time, be hacked and/or leaked. It will, for absolute certain, provide excellent targets for blackmail, extortion and fraud.
Thirdly, the data captured will provide excellent material for "fishing trips." People who may find themselves arrested, or in conflict with authorities, for one reason, can have this valuable database of evidence searched to find other accusations against them.
Privacy is a valuable item. We all have reason to maintain privacy, and it is far more worrying when it is the government intruding that privacy, against every person in the country, and on a vast, organised scale, than if I found a neighbour with a camera at my daughter's window.
Please let me know how you intend to vote on this bill and, if you intend to back the government, what your justification for doing so will be - please address my three concerns above.