Thanks...
...for the responses guys.
To respond to a point above. I was aware that DNA evidence alone *shouldn't* be enough to convict, but I think that isn't as inflexible as it might once have been, things are changed now,, people clearly are NOT innocent until proven guilty any more.. Circumstantial evidence + a DNA "match" is liable to be enough I fear :[
Either way, taking and keeping DNA from people simply arrested and acquitted is plain wrong. Its should not be allowed period but the heck can we do about it. I've tried contacting my MP about things before, all you get at best is a nice letter back saying, "nice to hear from you, but I'm gonna do this anyways," .... Guy Fawkes.. the only bloke to go to parliament with the right idea :[