Helloo
There are 2 kinds of CRB checks. One is called a standard, and the other is enhanced.
Since you will be working closely with the public, you will have to go through an enhanced criminal record background check.
This check discloses convictions, cautions, warnings and reprimands. (warnings and reprimands are only given to people under 18.
The check also includes (this is the difference between a standard and a normal CRB check) anything else that the chief officer of police may consider relevent to the position being applied for. You do not have a conviction or caution but the police did issue you with a PND and it will be the chief police officer's decision whether to disclose this in a CRB check.
It will go through a relevency test. It isn't as bad as other things you get could a PND for, such as theft of criminal damage. All you did really was to take a slash because public services weren't sufficient!
I would not have thought that this would be disclosed. It does not in my opinion show evidence of bad character that would be shown for other crimes that PNDs could be issued for.
However, I may be wrong and the police chief could be in a bad mood and disclose it.
Furthermore, a PND is not an admission of guilt, accepting and paying the fine does not constitute an official finding of guilt and there is no criminal record, It is treated as intelligence basically.