The bulb looks like this.
It's been mildly broken from my earlier effort to remove the light. I've tried holding at the base, pushing it in a bit, twisting left/right and then trying to take it out, but this hasn't worked. I've had this fitting for many years but have never had a problem removing the bulb before using this procedure. I can still twist left/right but for some unknown reason the bulb will not come out when pulled.
The light fitting itself looks like this