This video is believed to show a Spanish vessel - the RV Ramon Margalef - in British waters off the coast of Gibraltar.
It was uploaded to YouTube yesterday and purportedly includes extracts of the radio conversation between the ship's skipper and Gibraltar authorities.
ITV News cannot independently confirm the veracity of this footage.
More top news
A weather warning is in place across the south-east with heavy rainfall expected. Elsewhere there will be plenty of sunshine around.
Britain's Lewis Hamilton will join an elite club of double Formula One champions if he can secure a top-two finish in Abu Dhabi today.
A naked man fell through the ceiling of a women's toilet at a US airport before fleeing and "viciously assaulting" an elderly man.