Ummmm yes, you can send money to a prisoner, care of the govener, but it goes into a credit account to be spent in the prison shop , called 'canteen' .
That is where the prisoners get their sweets and fags, it all comes out of their 'canteen account' . Phone calls come out of the canteen account as well but they have a limit so that even if a particular prisoner has cash sent to his/her account they can not get extra phone calls.
They used to sell phone cards which prisoners could buy with canteen credit but they were being used as currency for fags and drugs , so the current phone system was set up to stop it.
As far as I know there is a limit of £30 a week on 'canteen credit' no matter where it comes from.