"A slug was certainly the last thing I was expecting to have caused the problem.
“We do not know how long the slug had been there.
Unfortunately, it was dead by the time we found it, so we were unable to question it.
“Sadly, you just can’t legislate for a rogue slug trying to take out Darlington’s traffic system.”
The control box will be sealed to keep other critters out. Link -via Arbroath