On Thu, 3 May 2018 21:07:17 +0100 (GMT+01:00), Jim K
wrote:

Tried to get to a 1/4 turn tap cartridge today to measure up for a
replacement valve. It's a monobloc style chrome basin tap,
nothing expensive.

I expected that after removing the cap in the middle of the
handle I would see a cross head screw. Undoing that would release
the handle from the top of the valve, the chrome shroud would
come off, revealing the valve, to unscrew & measure....

Mmm.
Removing the cap revealed no screw head? There was what could have
been the very end of a small bolt showing in the centre of the
newly revealed chrome handle body, but no obvious way to proceed?
I even unscrewed 2 of the 4 cross bars on the handle but no grub
screws or anything likely were revealed. The other two bars were
rather reluctant to move so that was that for then.

Anyone seen this type of thing before?
Any pointers welcome!
TIA

What was revealed when you unscrewed the crossbars? Did the crossbars
end in a screw that came from a screw hole in the handle, or did they
have a screw hole in the end that came from a screw sticking out of
the handle? If the former, perhaps you have to unscrew all four to
release the tap.

Other makes of tap have a grub screw low down on the side of the
handle. As the tap is only quarter turn maybe the screw never comes
into your view.
--
Dave W