It looks as though the father was a "joyner", modern spelling would be joiner, i.e. carpenter. One has to assume that the son chose to be a farmer. There is no mention on the certificate of what John junior's occupation was.
A little snippet of information:-
The original three routes to the freedom, via the livery companies, still exist. An individual can become a freeman of a livery company by servitude (apprenticeship), patrimony (either parent being a member of that livery company), or redemption (general admission, the criteria varying by livery company).
So it looks as though if the father was a Freeman a son could also become one.
