Been trying to find one but struggling! Seems quite a few advertise as ok for zone 2 but on closer inspection the light is IP44 but the socket is IP20! I thought I had sen one some time ago that had a flap over the socket, maintaining Ip44 but can't find it anymore.
http://www.cef.co.uk/catalogue/products/1031894-ip44-18w-low-energy-dual-voltage-shaverlight https://www.tlc-direct.co.uk/Technical/DataSheets/Lighting/TLSH18_manual.pdf Dont get it! Says its for zone 2 but also clearly says do not locate where it can be splashed!
It all all revolves around the socket which is fed via a safety isolating transformer (rcd will not see output) bit of a contradiction really, but hey ho off we go..