There are independent contractors providing services to the production house. I suggest you contact the studio offices located in the blue school house across the street from the studios. Many private companies lease office space in this facility. If you are in the area, it is very convenient to shop for jobs all in one place. Use google maps to locate the studios then look for the blue roof school house across the street. Google will provide the info you need to contact them. Hope this helps.
I'm not sure that Pinewood hires stylists. They actually rent their facilities to production companies to make films and tv shows.
Pinewood doesn't hire any of the people who work on a show. The production companies filming there, do. You need to contact the local IATSE office to see about joining the union.
Thanks! Your answer is awaiting moderation.