Scientists have identified the glue-like substance which has been killing sea birds off the Dorset coast. Plymouth University say its used as an additive in lubricating oils to improve performance. Hundreds of guillemots have been washing on up on beaches along the south coast.
More than 300 are being treated at an RSPCA centre in Somerset. An investigation is underway into where the substance came from.
It could be days before the true scale of the pollution spill affecting sea birds on the south coast is known, wildlife experts said today.
A change in wind direction could have killed thousands more birds after scores were found washed ashore along England's south coast.
Increasing numbers of birds are washing up on the south coast after being covered in a mysterious substance.