Kelston Roundhill is a working farm, and when you plan an event on a working farm you have to take certain things into account. There’s a reason the Countryside Code is clear about leaving gates as you find them.
This time a herd of cows wandered over the horizon through a gate someone had left open. Full marks to the resourceful guests for having the initiative to save the day: they chased the cows back in their field and had the gate to the main road closed even before we could even get there.

The farmer checks they’re all present. Try counting cows when they’re all bunched up; it’s hard.
That’s why as well as having a “leave no trace” policy we ask users of Roundhill Barn to be aware of and abide by the Countryside Code.