To whom it may concern,
It is my
duty to inform you that kidnapping is an offence under the common law of England and Wales, and that Great Britain does not now, nor will she ever negotiate with those who take hostages. Furthermore, having signed the Official Secrets Act, I will not be coerced, convinced, or otherwise forced to divulge sensitive information to ensure my own safety, nor, indeed, to barter for my freedom -- on that you may be sure.
Please accept my congratulations -- a locked train is at least an original venue -- and return me to my office immediately.
Sincerely,
M. Holmes,
"Civil Servant"