Hello Clive and welcome to the forum.
It is great that you want to find out more about Parkinson's so that you can better help your friend. Parkinson's UK has a network of local advisers. If you look at
you will be able to search for your nearest adviser. They will be able to tell you about all the forms of support that might help both you and your friend.
If that does not work give our helpline team a call or email. Their number is at the top of the page. They will be able to help you.
In any case you are welcome to ask anything on the forum. There are loads of people here with experience of pretty much every aspect of life with Parkinson's