Ash was, of course, refurbished as a IUKADGE bunker, as the standby southern SOC, and used as the OCU.
Never used operationally for anything, else then sold off afterwards. Totally hardening the bunker and installing the kit must have cost billions - so the company which bought it as a hardened data storage site got a real bargain.
I can vaguely remember attending the course, can’t remember where we were accommodated.
https://en.wikipedia.org/wiki/RAF_Ash