A conviction can never be removed, but out of court disposals such as cautions, warnings and reprimands can be deleted entirely from the Police National Computer if sufficient grounds can be established. Even your arrest record can be deleted in certain circumstances.
Can I get a caution removed from my record?
If you are wondering “Can I get a police caution removed?” then the simple answer is yes you can. A police caution can be removed from your record so that your CRB/DBS criminal records check is cleared.
How long do Cautions stay on your record?
Caution. If you admit an offence, the police can give you a caution. A caution is not a conviction. A caution is a warning which stays on your record for six years if you're an adult, or two years if you're under 18.