Thanks for the reply Harry.Turn both the hot and cold water off, remove the both tap insert cartridges from the taps and leave them in a dish of citric acid solution to soak. Whilst soaking, work the taps back and forth a few times. Citric acid is available from Wilko and many other places, quite cheaply.
I have now identified the tap, it's a Lamona roya one. I have also found instructions to take it apart. If the citric acid doesn't work apart from replacing the cartridge, is there anything else I should buy. Like washers etc.
It's only 4 years old, but am I likely to have difficulty taking it apart. Cheers Doug
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