(My guess is reduction in pressure is causing ceramic discs to weep).
Having discounted repairing it (mainly because it seems no one can guarantee the fit of the myriad of possible replacements) a new one seems in order.
We have no interest in anything "stylish", so have limited the budget.
A trawl of t'net found this, which looked good
however (typically) out of stock everywhere, with no immediate substitution apparent. There is this
but the black hose is a bit naff.
Anyone know of a similar product ? The single mixer is essential for SWMBO to be able to operate with one hand.