Hi,
Try googling the CHC assessors in your area. If not successful contact the primary care trust.
You must do your homework on the process before going into the assessment and do a dummy assessment yourself. It will be surprising what you come up with. Visualise your dad externally and internally to whilst doing the dummy assessment working from the head down. We found it a good process to go through to ensure that nothing got missed.
I would imagine that if your dad has prostrate cancer then he will have continence problems which should fulfill one of the criteria concerned.
Have a look at this link for CHC funding. This was a source of invaluable information re CHC funding provided to me by crazyfish for which my family and I will be forever grateful.
http://www.dh.gov.uk/health/2012/11/continuing-healthcare-revisions/
Make sure at any assessment that there is a multi displined team there and not just the social worker and care/nursing home manager. You should be in attendance also.
A good point to remember is how your dad would be if he did not take all of his medications.
The 'system' is not very good at informing people about CHC Funding but have a go for it and if turned down appeal.
Good luck and I am sure you will get lots of help and advice on this forum.