I found this article about it
http://www.dailymail.co.uk/news/worl...ernet-hit.html
He said staff biologists had confirmed that the 'creature' was actually a colony of worms.
The colonies attach themselves to roots that gradually work themselves into weak points in the pipes.
'They seem to respond to the light from the camera,' he said. 'That light is pretty hot.'
He said the phenomena had been seen before, but it was very rare.