agchristie...you are correct about the Lynette White case. The South Wales Plods excelled themselves in their stupidity and wholesale corruption :::
http://en.wikipedia.org/wiki/Murder_of_Lynette_White
As usual, as well as the wrong people being imprisoned, the real killers(s) have never been found. Here is another case, this time from my home town of Swansea :::
http://www.independent.co.uk/news/uk/detectives-lied-to-murder-trial-court-told-brothers-convictions-for-sex-shop-killing-relied-on-forged-entries-in-police-interview-notebooks-1422873.html
Once again, the wrong people were prosecuted and imprisoned, and the real killer(s) have yet to be apprehended. Another two aspects that both cases share is that the Police lied, and that there was no evidence to convict the innocent men that were found guilty.
If the Police, in South Wales or elsewhere in the UK, are wondering why they are now being treated with suspicion and ridicule, they should look no further than these two serious murder investigations.