Stephen Lewis has a cameo as the school coach driver. He is more famous as the Inspector "Blakey" from On The Buses (1969) that Baz was watching on his tv earlier.
The song " Breakaway" by Tracy Ullman can be heard but it wasn't released until 1983, 8 years after the setting of this episode.
The coach driver (Stephen Lewis) tells Miss Titley that the Jefferies Tube is damaged. The Jefferies Tube is from the Star Trek universe whereas if the turbolift is inoperable then the crew use the Jefferies Tube to transfer from one area of the ship to another.