Tastebud torment

Woke up this morning and found I couldn't drink tea!!! 'Have I suddenly become non-British?' I thought and promptly made a coffee instead (sorry, homoeopathist!) and that tasted equally vile.

So far, three teas and a coffee have been poured down the drain today. They all tasted like disinfectant. I bought some fresh milk but it wasn't any better. I tasted the tap water to see if the water company had overdone the chemicals overnight, but it just tasted like - well, water.

So what can it be? Water tastes fine, food tastes fine, but tea and coffee... yuk. Even a fruit tea tasted horrible. All theories gratefully received.