If you can find it, choose a sustainable source, labelled with the MSC blue tick. Herring is available year ... firm and slippery fish. Mackerel or sardines can be used as a substitute in recipes ...

Environmentalists say the sea area where the fish have spawned ... It was accompanied by a lighter blue colouration, visible from the shore, which was caused by herring sperm.

Tinned fish is having its big moment. If you're up for trying tinned herring, you may be surprised to know it's ready to eat straight from the can.