Alex321
Guru
- Location
- South Wales
I think its a pedantic distinction between a single lever tap and a mixer tap.
The majority of what appear to be mixer taps in the UK actually keep two separate channels through the spout, so the hot and cold waters do not mix until leaving the tap.
I don't know for sure, but I think that is less common in the single lever type (which are also more modern), than in the twin control type.