I don’t get why they wouldn’t just watch on tv
Apart from the temporary restrictions due to helicopters landing in the area, what is the issue with flying a drone near the racecourse ?
Or was it simply due to those restrictions ?
Not sure about the details but it is something to do with beating the bookies, the feed to the betting shops has a delay and this is in real time so they can theoretically bet ahead of the bookies. I stand to be corrected by those more knowledgeable.
These guys put bets on who’s gonna lose - the horses not showed on screen on the tele box. So they can take advantage of the drone being able to see who’s at the back abs make a bet while the race is still on.
It’s an entire industry
Maybe the smartest use of drones to date??? 
Moved your post into a thread that already existed on this subject.
Sorry about the duplicate post. Must have skipped over it before…
I heard the same on Radio 2 the other week. 
Yes, seems that you are right, think it also happens in America tas well. Trying to beat the feeds.