Indeed. I think you're saying much the same as I did when I wrote:If your lighting is wired in the 'loop in' system your neutral connection may have come adrift at another ceiling rose. As you appear to have one neutral in the problem light we can assume it is the end of the line. And as no other light is effected. ... If your lighting is wired using the older central junction box system you need locate that.
Do I take it that all the other lights in the house are working normally? If so, I suspect that something must have gone wrong with the connection at the other end (wherever that may be) of that black wire which is meant to be the neutral.
Kind Regards, John
