Jack Straw has a case, but this story is magnificent fuel for the present debate on civil liberties. Would you mind being held for 42 days yourself, before being charged, and then convicted on the strength of anonymous evidence? If you think it unlikely, consider the now long-standing abuse of the RIP Act.
I wish he would not repeatedly emphasize the complexity of the issue, and that he would not suggest that this is a problem “these days”. I refuse to believe that witness intimidation and recrimination is a “modern” problem.