Roy Wilson, a Conservative activist with professional experience in law and security, asks why Eliza Manningham-Buller and others see 42 days detention as so different in principle to 28 days.
Baroness Manningham-Buller, former head of MI5, was said to have very much helped Davis in his campaign for the rejection of 42 days detention, by her speech to the House of Lords when she stated that someone detained for 42 days, an increased from 28 days, would not or might not get a fair trial because of the extra days under the proposal and that she was against it. Yet many are charged and in custody for many months before their trial is heard.
An example: Yasin Omar was arrested on the 27th July, 2005 suspected of terrorist offences together with five others. Charged ten days later and detained in custody till trial. Trial 28th August 2006. Pleaded not guilty; detained in custody; trial adjourned and completed 9th July 2007 - nearly two years later. Found guilty, sentenced to life. As far as I am aware she didn't complain that he and his accomplices did not receive a fair trial (although to be fair the judge did complain that it took too long to be concluded).