I grew up on the beaches of Pembrokeshire in south-west Wales. Visits to Tenby were my family’s summer ritual: sand between our toes, paddling in rockpools, strawberry syrup on ice cream.

But 30 years ago, I vividly remember walking along Tenby’s North Beach with my mother and grandmother. No crowds. No laughter. Just the hush of waves sliding over dark, tar‑smudged sand. The holiday postcards had gone grey.

At about 8pm on February 15 1996, the Sea Empress oil tanker missed her tug escort into port by minutes. The ship veered inside the mouth of Milford Haven and struck rocks near St Ann’s Head.

Over the next stormy week, it grounded and re‑grounded many times, creating more damage to the hull each time. About 72,000 tonnes of North Sea crude oil were spilled. This was Britain’s worst coastal oil disaster in a generation.

The fightback was messy. Weather worsened. Control systems to manage the spill were strained. Nine separate releases of oil stained the sea as wind and tide shoved a wounded tanker around the edges of the Pembrokeshire Coast national park.

Aircraft spread dispersants to try to break up the oil spill. Rough seas helped break oil into smaller droplets. This kept oil suspended in the water (not just floating on the surface), which can increase exposure and toxicity for sea and plant life, even as the visible surface layer declined.

At the same time, because the spilled oil contained a lot of relatively volatile petrol components and the weather was windy and the sea choppy, an estimated 35-45% evaporated in the first two days.

In all, 11,000-16,000 tonnes of water-in-oil emulsion are estimated to have reached the shore – far less than the........

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