Hi, not sure I can be much help but can only let you know what happens at Mum's care home. They always write each April to advise that the fees will increase by the maximum guideline 'due to increased costs' which is usually £7 per day. This equates to over £200 per month. From what I have read the Social Services contribute about £450/£500 per month which only ever seems to increase by inflation meaning they only pay about £25 per month more making the top up gap even bigger.
I was recently looking at this sight,
http://alzheimers.org...ad_info.php?fileID=75
when you click on the PDF it may help you to find out a bit about continuing care under NHS.
Whilst I object to the fact that as a self funder Mum has to pay extra to subsidise people who are funded by social services, I think those that are in need should get a decent contribution.
Good luck.