please find more information about this here.
You can get in touch with the police using their non-emergency 101 number or you can find info about reporting to the police online here.
Remember, you are a victim of crime. Be prepared that they may not know the best way to deal with your problem, but you should always expect a non-biased, non-judgemental response.
Make sure you keep a record of your log/case number so the police can quickly access your details if you want to add additional information or get an update on the investigation. It will also save you having to repeat what has happened over and over which may be distressing for you.
If you are in any immediate threat of physical danger or risk, call 999.
Find information about services offering free legal advice for victims of intimate image abuse. Please find more information and details about the services here.