There's also a video that some of the staff took of it at high tide on Friday:
What seems to have happened is that the tide got high enough to wash over the top of the road and plunge over the other side - there are several points where there are holes created by the water:
with the scoured shingle from under the road spread out beyond them:
But in some places the scouring went a bit further...
One of the passing places has collapsed:
and in another area the scouring caused the whole road to cave in:
this of course led to more scouring on the upstream side of the collapsed road:
and then scenes like this:
Parts of the road are now some distance away...
and another slab is a bit lower than it used to be:
The force of the water had also pushed the fence over and uncovered an electricity cable:
Part of me wishes I'd been there on Thursday night to watch it happen, but it probably wouldn't have been the safest place to be... Bizarrely I may have been the last person to cross this bit of road before it fell in, as I went for a night-time bike ride down there on Thursday evening (with some very bright LED lights) and crossed this part of the road at about 9:30pm - it would have caved in at about 1am.
Mike