The Palmerston and Camberwell Arms are undenibaly gastropubs - pubs which have had a dining room and kitchen fitted, now more known for their food, but you can still go in for a pint, and they carry a full selection of draft beers. Franklins doesn't really fall into that category, the bar area is very small and doesn't really "feel" like a pub. Conversely places like The Bishop or Great Exhibition are not gastro pubs. You cannot book tables, there is no separate dining room, and the food is generic.