The previous owners of our house fitted very expensive taps into our bathroom. I mean very expensive gold Max Pike taps at over £1000 (yes, I know...). The sick has three hole taps and the cold one will turn on but will not release water at all. A plumber has had a go at undoing the tap to look but cannot get it to unscrew at all. The whole thing is seized. I know you can get replacement brass insides for taps. Mr GL can't see any other option than to replace the sink taps completely, but he won't replace like for like, which means the sink and bath taps will not match any more. Replacement taps would still be expensive (though not as expensive as replacing with the same) but then a permanent source of irritation with taps that don't match. I can't believe there isn't a solution to unscrewing the tap and replacing the insides. Any ideas please?