A floor to ceiling cupboard would work well in this space. As mentioned in the above comment using Mirror on such a large surface in the bathroom could become a hassle to constantly keep clean. However if you do like to look of Mirror I do suggest a dark tinted mirror, as this would go quite nicely with the colour of your tiles and not look to harsh in the bathroom. For the doors a Pocket door system would work quite well! this is where the door is opened and then you can slide it back to be in line with the cabinetry. I would keep the colours of this cabinetry quite plain and stick to the same colour palette of the tiles. Goodluck !

Kat Jat - choosing colours is a slow process to get it right. Pottsy's idea of getting some towels or even pieces of fabrics in colours you would like is a good start to check the colour in the room. You then have to consider the aspect of the room - e.g. a south facing room will be much cooler than a west facing one, and often have more muted natural light so you need colours that won't mud in dull light and add warmth to the room. A west facing room is the opposite and needs more cooling colours, especailly when the afternoon light floods in. Keeping the colours fresh helps too. Once you establish what look to be the best colours for a room, use your fabric samples and towels, visit your local paint shop and ask to see their colour atlas (generally hidden under the counter). This contains hundreds of variations of shades so you can find just the right shade for your room. If you can pick up a colour chip good, but many colours never make it to chips. Then go on the Paint companies' websites, download photos of your rooms and you can do a virtual paint of the room to give you an idea of that shade in your room. Unfortunately colours do not reproduce well on screen but it will help you narrow colours down more and then you can pick up some paint chips or some sample pots to be doubly sure of the colour in the room. Leave the colours in the room for a few days too to check them out in all lights and at different times of the day. It is a slow process, but if you want to DIY, then i it guarantees the most success. PS - Funny Pottsy, I think blue is the perfect colour for a bathroom, to me it represents water and cleanness and freshness. Of course there are blues and there are blues, getting the right one matters. :)

@HU-319610855 I’m not saying this to be even the slightest bit contradictory, so please don’t take it that way. We had seperate everything. Doors, walls and divisions everywhere. We pulled it all out and went combo. We‘ve never had an issue with conflicting use, and we love the feeling of extra space and openness it created. I’m sure it all depends on your household. :-)

I have just moved into a new house where we designed a kitchen/scullery very similar to yours - kitchen for preparation and cooking while being part of the household and the scullery for dirty dishes and storage of crockery and food items that are used occasionally or for sandwiches and snacks (little preparation). There is also a drinks area just outside the scullery (with a very small sink and a tap that has a choice of ready hot or chilled water - it is used constantly). The fridge is placed in the middle between the main preparation kitchen and the scullery where the toaster is also kept. People wanting coffee, toast, snacks can access everything without bothering the person/ people cooking. Our hot plates and wall oven are separated by an L-shaped bench with a single sink, which works very well. However, the sink is much closer to the oven than the hot plates which was bad planning. I underestimated the number of times I move between the sink and the stove top (including rinsing my hands between tasks). The sink needs to be close to the cooktop - and, because you are not stacking dirty or drying dishes there, the amount of bench space between the cooktop and sink does not need to be all that large. One other thing that I am really glad we upgraded to is a synthetic stone bench that is allows you to put pans on directly from the oven (most do not) - brilliant. It also allows you to cut directly in in. I usually don't do this, not because I ma concerned about the bench top but because I dont want to blunt my good knives :)