Camden market on Sundays is hell on earth.
Nothing wrong with a bit of bustle... we will be passing through there at about 11am and its not too bad by then.
I am trying to think of a back route from Finsbury Park to Camden that can be done in an hour. You must be a fast walker or I am verry slooow! Though my husband says it could be done in an hour so perhaps I should try it one day but I am too lazy!