Chemists at Plymouth University have identified the sticky substance that has killed hundreds of sea birds off the Devon and Dorset coast.
Their findings suggest it's a form of Poly Isol Butene, or PIB, used as a lubricating additive in oils to improve performance.
Tamsin Eames reports:
More top news
A builder has been ordered to pay £2,500 for opening a sluice gate on the Somerset Levels at the height of the floods.
Danny Cipriani created one try and scored another as Sale wrecked Exeter's hopes of climbing to the top of the Aviva Premiership.
Repairs to an iconic landmark in Newquay were completed today.