Can you suggest interesting part-time work for my retired father?

[artfilmboy]

My father is due to retire at the end of march 2007 at the age of 60. He is looking for interesting and rewarding part-time work, where he gets an opportunity to use his brain, such as being on the patients' board/committee of the local NHS Trust for x days a year. It needn't be highly paid, e.g. expenses.
My question is how does he find out about these sort of jobs/opportunities? Where are they advertised?

Thanks,

Andrew