Had to pop out to catch the post today so left my GF in charge of the record player. She already knows where the volume control is, but this time I showed her how to lift the arm off the record when it has finished. To my delight, on returning I found that not only had she had done so, returning the arm to the rest, she had correctly put the record back in the inner and outer sleeve.
Next step will be to show her how to put a record on the TT and cue the arm. That will be Part 2 of the test.