Because it is affecting innocent people up and down the country who cannot move on with their lives following false allegations.
It is not right that allegations made against a person, which have been investigated by the police and no further action taken should show up on an enhanced CRB check for future employers to see and potentially provent a person from getting a job.
If you are accused of a crime and charged you can go to court and defend yourself and potentially be exhonorated. If you are accused of a crime and there is no basis to it, no further action and no charge it lingers over you for the rest of your days. It shows up on enhanced CRB checks and irrespective of what people say, if something negative comes back people do think "theres no smoke without fire", you are not going to get a job.
What happend to the presumption that you are inncocent until proven guilty? I agree we should protect the vulnerable but there has to be a better way of doing it.