I believe this was first noticed a few weeks ago by Joan Goddard of the MCG (it's not far from our cottage). She parked up to make cars pull out to avoid the hole, called Highways, then remained at the roadside until they eventually arrived to cone it off.
The temp traffic lights were on red both ways on Saturday, I waited 45 mins on hold to tell Highways then gave up. Prob still red now.
It's just a short distance from old mine workings.