It is propaganda for the benefit of y'all!! I'm glad it's paying off. It started with microwaved potatoes and now we're onto tinned fish. What's next?
I haven't tried the cod liver so I'll defer to Thornburywitch. For the herring, however you want, also as per Thornburywitch! I normally just eat them out of the can, but yeh with crackers, over rice, in a pasta. Whatever you want. I just insist you give them a taste by themselves first though

I had a tomato one flavoured herring from Aldi last week and I put it in a sandwich and ate it together that way.

The smoked cod liver will have a very strong taste - recommend stirring a little of it through pasta or spread thinly on a nice thick slice of bread. Cod liver oil is an acquired taste, but very very good for you being rrrrrich in vitamin d and all sorts of goodies. The herrings will be delicious whatever you do with them. I like them on hot rice, with a salad alongside. Or on toast. Or stirred through chopped greens for a salad, but you do you.