i was watching this clip from The Sarah Jane Adventures when i saw someone i thought i recognized, i went back and checked and it was her Zienia Merton best known to science fiction fans for her role as Sandra Benes in Space: 1999.

she is playing the Registrar in The Sarah Jane Adventures, she aged VERY well, too bad she is gone now.

you can read more about her here

https://tardis.fandom.com/wiki/Zienia_Merton


you can catch her at 22:10