My DS wants to join the police and, as part of vetting, they look at credit ratings etc. DS looked at his today online and it is ‘fair’. He has no overdraft or debt so was surprised but it is apparently because he is never been credit checked and, while being checked too often is bad, not being checked at all is not good either. He now wants to boost his credit score so is contemplating applying for a credit card (which he would use sparingly and pay off in full immediately). Is this a good idea? He is reluctant to come off our family mobile contract (which is in my name) because it only costs him £10 per month so needs to look at any other ideas….