Prison and living with dementia - from Helen

My Dad is in prison and he has just been diagnosed with having dementia.
To try and understand this I went on a dementia awareness course and learnt a lot. 
Mental stimulation and keeping active is essential for those living with dementia but I don't see how this can be possible in prison. Staff need to be made aware of this. I know people will say that my Dad deserves to be in prison and I agree with that but the prison service have a duty of care to understand the illness and attend to his needs. I would love to know what training and resources are in place for those living with dementia in prison. Please if anyone has any information, it would be greatly appreciated. Regards Helena.