I guess this was the accident spot: https://www.strava.com/activities/241058971/analysis/1282/1343 (streetview)
Yes, good detective work the exact spot.
I shouted to Steve that sharp corners dropping down, were coming up and went ahead, but as the roads were dry so far that morning and wind was behind us the ice was totally unexpected.
Sheet black ice, was even difficult to stand up. So glad Steve was OK. We stopped for a pee and quick bike check over and walked the corners. Not wanting to disrupt Steve's progress I convinced him I was OK and sent him on his way, I knew I was in big trouble.
I've badly cracked my hip socket and have 8 weeks of bed rest to look forward too, just have to console myself that I took one for the team.
My TCR and PBP double attempt might be a touch harder this year.