I'd expect that there's a screw holding the tap knob onto its shaft, either
under the white central C/H logo in the top of the knob, or in the side of
the knob screwed sideways into the tap shaft. Once you've loosened that the
knob should come off.
Then the tapered section should just unscrew from the bit under it, though
it might be pretty stiff. I should think the taper would make it tricky to
get a good grip on it with a wrench. There might just be some slight
'flats' on the lowest part of the taper allowing a wide wrench to fit over
them. If you have to exert a lot of force trying to loosen the tapered bit
be sure to use your other hand to apply a counter-force on the spout of the
tap to prevent the whole tap from rotating in its socket in the sink, as
loosening that or - worst case - damaging the seal between tap and supply
pipe will make the whole job much more complicated.
--
Jeremy C B Nicoll - my opinions are my own.
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