Many of what we regard of as basic rights, we have because of the rights won by the English in the centuries leading up to us.
Apparently, Parliament did away with one of those, or at least severely curtailed it, back in 2003, when the Blair government passed a law which allowed for the re-prosecution of certain offenses (most notably murder) even after a jury had found a person to be innocent of the crime. Now, I am all for getting the criminal and putting them away (and sometimes more). However, I'm uncomfortable in doing away with the double jeopardy rule and allowing the government to keep coming after someone after a jury has found him or her not guilty.
So now someone who had been found not guilty, is back in the dock facing a murder charge for a third time.
Thankfully, we still have a Constitution.