In the 1987 appeal involving the Birmingham Six, some of the many forensic errors began to be uncovered; IIRC critical pages were shown to have been torn out of a laboratory notebook at this time (which fits in nicely with the theme of this thread). However, Lord Lane and the other presiding judges were oblivious.* The six were ultimately exonerated; however, the case was obviously flawed from the beginning. When five of them were first detained, one of them said to the authorities words to the effect, "Can you let our friend Paddy Joe Hill, who went ahead of us, know that we will catch up with him when we can?" Would hardened IRA men have voluntarily given up one of their own?
This case, along with the related cases of the Maguire Seven, the Guildford Four, and Judith Ward, are a national embarrassment. The Lindy Chamberlain case is a national embarrassment. The Todd Willingham case is a national embarrassment...
EDT
*Gareth Peirce wrote, "When the court rejected the appeal, commenting "the longer this hearing has gone on, the more convinced this court has become that the verdict of the jury was correct", the men's expectations of immediate release were in smithereens, but so too was the reputation of British justice."