Alex Ritson

Richard Hamilton.

A British supermarket chain, Waitrose, has announced that it's suspending the sale of mackerel because of overfishing.

All fresh, chilled and frozen mackerel will no longer be sold and tinned mackerel stocks will not be replenished.

Retailers said the British government fishing quotas were still too high.

Charles Clover, who's the co-founder of the conservation charity Blue Marine Foundation, told us more about how mackerel stocks in the North Atlantic had plummeted in the last decade.

The mackerel has been a disaster waiting to happen for about a decade.

And now things are getting pretty grim.

And it's what politicians should really be worrying about.

It's down 75%.

The stock of mackerel in the Northeast Atlantic is down 75% in a decade.

And it's still being overfished.

There are people going out in their very large pelagic trawlers and scooping it up.

And this really should be stopped.

Britain, Norway and the Faroes agreed to reduce their catches by 48% this year.

But that's not what the scientists are asking for.

Scientists are asking for a 70% reduction in catches of mackerel in the Northeast Atlantic.

So, you know, Britain, Norway, Iceland and the Faroes are in the frame.

as being responsible for overfishing this very valuable and delicious stock, one of the last very valuable stocks that we haven't overfished.

There are lots of other healthy fish.

Personally, I like herring, which is in very good supply at the moment, but is not being caught.