The police have spoken to me about an allegation against me

If a police officer talks to you about an allegation against you and takes your name and address, they might record your details on a local police computer system.  Nothing will appear on your criminal record (stored on the police national computer) unless they take you to court (charge you), or give you a formal warning for something you admitted doing (a caution).  The police force who spoke to you might store the details on their own computer system but this doesn’t affect your criminal record.