Based on the plans you provided I would go with number 2 (top row - right) with everything on the right hand side, so you walk in the door and the room looks spacious and you are not looking directly at a toilet from your hallway. All the plumbing runs along one wall and that is always the cheapest option and you can have a heated towel rail or similar running along the wall next to the entry. If it is possible I would rehang the door so it opens to the right not the left and then I would swap the toilet and basin so the toilet is tucked behind the door (for a little more privacy) and the vanities will be next to the shower. Good Luck.

the problem with rearranging the fixtures is that none of the alternatives leaves enough walking space except the last, which is the same as what you have already first try an automatic door closer and consider a custom vanity with a small drop in sink in a counter that has a narrow section that continues across the top of the toilet and a wall mirror or mirrored medicine cabinet the maximum width of available wall under the windows...widening the counter will be useful and the mirrors and gorgeous new tiles, bath and vanity will help to distract from the view of the toilet

there isn't enough space for any complex arrangements and a simple neat small bathroom and separate laundry will be so much easier to use if you make sure that all the fixtures are sized to suit ie 90cm wide vanities for bath and ensuite with in wall mirror doored wall cabinets will enhance the feeling of spaciousness and hinged doors are great for extra towel rails and coat hooks as sliding doors would need need thicker walls, restrict attachment of towel rails and interrupt electrical wiring and plumbing and how low is the bulk head??? shower should fit OK as long as the bulk head is no lower than door height and even a bathtub with handheld shower is still better than a shared bathroom laundry open to the back door...best of luck

Yes thank you for your thoughts. the room is 2.8 (with window) vs 3.4m. I do find it a bit annoying too as I don't like that you open the door and see straight away into the shower (though I'm certain the door would have a lock). I'm sure they lined the bath up to be with the window as visually that looks better, but then I find the space at the end annoying. I like the alternative drawings (I like three of them lots!) and I had been considering an drop in bath built wall to wall rather than a freestanding but also finding it frustrating to find a really nice supportive bath and there are less drop in baths than freestanding around at the moment which is a bit annoying. Thanks Anna for the picture, that helps as that looks good (though we would have more space at either end, 50cm) and I prefer the look of yours with some space but not as cavenous... I think I might have to have a talk with my husband as we really need to work out what to do!!