How can I replace the bulb in a GU495 bathroom downlighter?

I cannot find a way of removing the chrome bezel to access the bulb. I have had the whole unit out and there is no visible way of removing it. I have tried twisting it in case it is a screw thread. I have tried to lever it off with a screwdriver. I dare not push this any harder for fear of breaking the unit - there must be something I am missing. The unit in question is by "Click"