Well exactly. The information I posted earlier was from a newspaper article about this (it's deemed a public interest case around here so it's been covered a lot).
I have replied to clarify which part has upset them, although I am guessing it was that they decided the risk to her in a male prison was less than the risk to others in a female prison.
Horrid message though. Rather concerning.
(NB: Although entirely without a legal basis, it was just horrid to read).