Do police warnings show up on crb?
There are misconceptions surrounding the CRB. Unless you have been CONVICTED of a crime your CRB will be clean. Being arrested does NOT in it’s self generate a criminal record. You didn’t say you were arrested, just that you had to attend the Police station to explain yourself. The matter was resolved with the warning and that was that. You have nothing to worry about and are not obliged to disclose anything.