Just went to put a fitting in the bathroom - it's IP44, Class 1, pull switch, to go into Zone 2 (more on this in another thread). The glass cover is a bit broken and that protects the lamp from below. However, the GU10 lamp has to be pushed in firmly as there's a seal in the socket - looks as if it does a good job. The glass cover doesn't actually seal fit closely to the body, so I assume that it's there mainly to protect a hot halogen lamp from being shattered by a splash of cold water.
So, Im wondering if the fitting is still OK to install, as it's protected by seals top and bottom and will have a LED lamp.