The report from the University of Victoria found that many of the so-called eco-labels were not much better than conventional farmed fish when it came to protecting the oceans, and some – including those produced under the Marks & Spencer brand – were actually worse.


The study, which was reviewed and was supported by the Pew Environment Group, used 10 factors to rate the eco-labels including feeding, antibiotic use and energy use.

Marks & Spencer scored at the bottom, or second from the bottom, on all four sets of rankings. Of any of the labels, it was the furthest from reaching the voluntary standards set by the Monterey Bay Aquarium seafood watch guide and the Blue Ocean Institute seafood guide.

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