How to locate which prison someone is in?

[CornishTeaTime]

Other than the Government form/email.
How can I find out which prison a family member is in?

www.gov.uk/find-prisoner

Thanks but other than this is there another way

Court listings but dont know when hearing was

Does the person want you to know/get in contact? If you write to them perhaps the letter gets passed on?

But I dont know which prison!

I don't understand why you don't want to go through the normal channels?

Because the prisoner has to agree to that info being released

Op maybe doesn't want them to know they are finding out?