Tuna in oil is not free, it has to be fresh/in brine etc:
Tuna, canned in oil, drained, 100g 3½
Fish fingers, cod, in breadcrumbs, grilled, standard, each 2
Fish fingers, cod, in breadcrumbs, grilled, large, each 4
Fish fingers, salmon, in breadcrumbs, grilled, each 1
Fish fingers, haddock, in breadcrumbs, grilled, each 2
Fish fingers, pollack, in breadcrumbs, grilled, each 2