World tuna prices continue to rise as catching remain poor.

Even Thai canners are closing for part of the week as raw material supplies run out. Costs are now prohibiting the popular bogofs at retail level.

So far, UK importers say it is only a matter of delayed shipments although prices will have to be increased shortly, according to importers.

But a German importer said: “The real problems haven’t yet surfaced. There isn’t any fish to match lower priced contracts placed earlier in the year.”

Scientists say warmer sea temperatures have forced the shoals into lower depths.

Hardest luck seems to be in South America where reports of contract cancellations abound.