Here is what Caron Lindsay says. I agree with her conclusion that:
"To me, it’s quite clear that this is a typical Fail stitch up. This is a publication that sees politicians they don’t like such as Ed Miliband, Nick Clegg and their families as fair game. Harriet Harman made some liberal observations about an illiberal bill being debated in Parliament. At that time, a pretty horrible organisation was affiliated to her employers. There is no relationship between those two facts.
The Fail has managed to target not only someone they’ve loathed for a very long time, but also take a pop at civil liberties, too. It can’t be an accident that this has all come out as NCCL’s successor, Liberty, celebrates its 80th birthday. The Fail is wrong and shouldn’t get away with it."
It's a good blog post and worth reading.