THIS WEEK IN 1990: Shellfish recruited to fight pollution

HNMZS Achilles, a veteran of the battle of the River Plate. After the war she was sold to India and was finally broken up in 1978 when 55 years old.

NOSTALGIA: Twenty-nine dead in Portsmouth Dockyard explosion

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Thousands of baby oysters were signed up by the Royal Navy to fight pollution in Portsmouth Harbour.

The molluscs would help scientists discover how much toxic run-off from anti-fouling ship paint found its way into the water.

Ministry of Defence experts wanted to be certain that controls over the use and disposal of potentially harmful chemical compounds were tight enough in the naval base.

In particular, researchers were looking for tributyltin, a man-made substance used not only in paint, but also anti-rot treatment for woodwork.