UNIT HQ canteen

The UNIT HQ canteen was where UNIT personnel ate while at work. The Third Doctor thought the canteen was filthy and that it should have been shut down on "eight counts of galactic health-and-safety violations". (PROSE: Faithful Friends: Part 1)

During the Meercock incident, Jo Grant briefly thought about having corned beef sandwiches and hot cocoa in the UNIT HQ canteen. (PROSE: Verdigris)

The Christmas after Jo left UNIT, the canteen was decorated with paper chains, lanterns, and a large Christmas tree. The Doctor didn't notice this because by this point he hadn't used the canteen for several years. (PROSE: Faithful Friends: Part 1)