Can’t understand it. What a shame for the sport.
Really? I have been involved in running horse classes at an agricultural show for over 30 yrs. That show usually runs the first weekend in August but was cancelled last year and the decision has been taken not to run again this year, for exactly the same reasons that Burghley have stated - uncertainty about the future pandemic status, the need to spend many months planning and the inability to insure against cancellation. It doesn't surprise me at all, although of course it is disappointing.
I'm sad about it, even if limited numbers and watch the rest on telly. And while it might not be true/accurate it feels like other stuff is running enough that it should be doable in some way.