BBC: Rescued birds are to fly at sea for the first time since being found on the coast covered in an oil additive.
More than 300 guillemots and razorbills found covered in glue-like polyisobutene (PIB) four weeks ago have been cared for by the RSPCA.
Most of them were discovered on Dorset beaches where they were found covered in the waxy substance.
The RSPCA said it hoped up to 29 birds could be released from a cliff top in the Portland area on Thursday.
Washing-up liquid
They are to be...