Not a bad guess from this distance!
Fancy you seeing them at the Castle just after I stumbled across them on line
A small dedicated garden bed of those in a mass planting would look fantastic (if it were possible)
However, I believe most terrestrial orchids don't transplant well & would most likely die in the process.
Most live in a symbiotic relationship with different types of fungus & need them also to survive.
Enjoy it while it lasts Tony.