What time does Forest School stop at?

TLDR: what time does the forest school stop?

I got the fantastic new today that childcare has fallen through so my little darlings will have the pleasure of accompanying me to the festival.

They came with me last year and loved the forest school but I seem to remember it closing in the afternoon. We weren’t planning on arriving until about 4pm on Thursday but if it’s closed then I’ll try and make it earlier.