However Woburn did have the closely related Hangul back then. It was not recorded as breeding but as most of the 11th Duke of Bedford's deer were unfortunately allowed to interbreed there might still be some hangul blood in the mix to this day.
I believe the Hangul had to be kept in grassless yards or paddocks as being a high altitude species they were susceptible to parasitic infection picked up from grazing used by other Deer. I don't know if they were ever kept in the main park however before it was discovered they had special requirements. Its an interesting point whether/how many of these unusual subspecies may have interbred with other deer kept there