Asked the course manager where the silica sand might come from. He will let me know when he has more information.
Horses in training ? a guess - I'd reckon 400-odd. Some of course come from private stables.
Trainers? again, off the top of my head...16 based here, and 5 or 6 not based here. But if I bothered to look it all up in the last NZTR monthly mag, I may be a tad more accurate.
I have no knowledge of any trainers [ yet ] that may be attracted by a synthetic. Early days of course, not done yet.
As for younger trainers generally, if under-50 counts as 'young' we have Nicky Lloyd, Andrew Carston, Champion/Murphy, Matt Pitman,
Lee Callaway, Richard Didham, Aaron Taylor...struggle to think of any more. Carston, Callaway and Pitman would be the only ones under 40.
Training ? one trainer was told that we would have to gallop on the sand. But I'm informed that the sand is being eliminated for contamination reasons, so....beats me.
I've considered the Hughes' , and Champion/Murphy, as one entity each BTW.