When I turned the lights on this morning I noticed that the middle set of lights on the south side of the PSL lab table were not working.  This was the case for both circuits (middle bulb is one switch and two outer bulbs are another switch).

On closer inspection it looks like the glass of the fluorescent tubes are actually cracked at the ends.  I didn't want to remove myself given the risk of it cracking and there being broken glass. Also some older bulbs have mercury in them.

I will log a job with maintenance one I work out who to call.