A sign-language provider for the very young children's channel on the BBC, handily abbreviated to CBeebies, has been arrested this morning after allegations that he was using sign language to communicate terror related instructions to terrorist cells.
"We were alerted by a concerned mother," said detective in charge, Simon Gning. "She herself is not deaf, although her child is not either. She is a sing and sign teacher however, and as such has a rudimentary knowledge of children's sign language."
According to Gning, the mother (who cannot be named due to restrictions on which letters and numbers may be published on the internet) noticed that the signs did not match the words being spoken on the screen.
"She claims that while Mr Tumble was instructing the normal of hearing, the not deaf, if you like, on how to make a snail and a swan, the signer was instructing the deaf, or the not normal of hearing, on how to make a nail bomb."
Police were able to use the woman's information to apprehend a terrorist as he was planting a nail bomb, in the shape of an origami swan, at Covent Garden.
"The fact that she knew exactly where the bomb was to be put," said Gning, "led us to believe her information was correct. Although there is an outside chance that it was mere coincidence."
Gning is grateful for the eagle-eyed viewer.
"We were very surprised," said Gning. "There isn't anybody normally watching Cbeebies at that time."