Amazing to hear that they staged a junior meeting in the afternoon! Apparently the surface was tyre-packed afterwards. Interview with Klindt on BSN, he said it's a known problem, but after doing a track walk he felt it was much worse, possibly because of all the rain this week.
From the view on BSN, blading the shale seemed pointless, because they were just back to the shiny clay - it would have taken an age to try to relay the surface.
As it is, the riders never got changed, so weren't remotely interested in riding.
I'm told that turnstiles weren't closed until the formal announcement at about 19:25 ...