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From what I can find, I think you're right tony that it is only if you have HID or LED lights that you have to have working headlamp washer/wipers. Anyway, this might be the least of my worries....
Funnily enough the same (village) garage that I'm taking it to next week, gave my an advisory last time about unsatisfactory state of the spare wheel. I've looked it up, and the spare wheel is not part of an MoT test! Glad I found out in case it happens again, or he fails me on it....