A police helicopter has filmed an unidentified flying object, only visible using an infrared camera.
The footage was tweeted by the National Police Air Service St Athan account.
According to the tweet, nothing was seen in the area by local air traffic control.
In the video, the images switches between daylight and infrared imaging. Only when on infrared is the object visible.
Responding to questions on twitter, the object was described as 'hot' and travelling into the wind.
Because of this, it's thought not to have been a lantern.
The object was spotted over the Bristol channel, flying at around 1,000ft.