I know John Le Page is now in England, but I am sure he has a contact address. It might be worth finding out how if he kept any register of the elderly and vulnerable to check up on.
Regarding young people and trouble in the Parish - what about looking to give them some facilities to do some kind of show at Communicare/Les Quennevais, which would involve a lot of different kinds of work, give them motivation, a place to go, and involve good numbers - and could also involve some of the elderly as well, thus mixing generations. They could also do fund raising, but perhaps have some grant from the Parish budget.