A topic raised by this article:
Some of the reasons why people don't get out are suggested in this article. But it's not, of course, a problem that's confined to people with dementia. Many elderly people are reluctant, or feel unable, to go out.
There are some schemes - such as 'Good Neighbours' - which involve, amongst other things, volunteers visiting people like this and taking them out. Clearly, there should be a much greater effort to ensure that no-one feels trapped in their house.
Cameron used to promote the 'Big Society', a concept which encompassed schemes like these.
I don't think the words 'Big Society' have passed his lips for a long time though.