If it does not start 052 your Notice was issued by different police force and you will need to contact them for more information. If there are no contact details on the Notice, call 101 and ask to be put through to the Camera Processing Unit for the police force that cover where the alleged offence took place.
If the reference starts 052 but the next number is not 3 then the Notice was issued by Avon and Somerset Constabulary but you will not be able to see details of the alleged offence on the Public Access System. You will need to contact the Speed Enforcement Unit if you want more information. Click on Contact Us above to find out how.