Does anyone know if it's possible to have a bath with a rainfall shower and a handheld shower all over it all controlled by a single panel on the side? Similar to the photo attached. I only seem to be able to find thermostatic mixers which control the handheld and the main shower above the bath but don't include the bath, unless this one does too but I don't see how it fills the bath if that makes sense? www.builderdepot.co.uk/grohe-grohtherm-3000-cosmopolitan-thermostatic-bath-shower-kit-chrome.html
We have as the photo for the shower and separate taps for the bath. How can you turn the taps off with your toes if they are halfway up the wall? Seriously though, hats off to you for trying to reduce taps and knobs.
You have a triple diverter that switches between the three outlets - bath. handheld and shower head. The water for the bath comes out of the bath filler, which is the round thing in your pic. The filler also acts as an overflow.
Sorry anonymous, I was looking at your three knob picture (so to speak). That does indeed look like a two way diverter but it may be that there's one knob for on/off/temp and there other has three settings like this hansgrohe one. Either way, check with Builders Depot - what you're asking for isn't unusual. Bath obvs needs to be suitable - no tap holes.