This is called a “subject access request” and will be covered under the Police and course providers obligations under the Data Protection Act 2018 and the General Data Protection Regulations (GDPR)
If you are the data subject, you should contact the police force who made you the course offer. If you’re doing this online, please look under the forces website pages around data protection. They should have published a protocol for you to access your personal data. The course provider with whom you completed the course should also have this facility and you may wish to contact them.
If not, consider contacting us.