I hope you find this updated concept will add a more luxurious and custom feel to your ensuite. All wall dimensions have remained the same, with the exception of suggested alterations to the separation wall which previously existed between vanity and w/c.
It is a simple concept, easy enough to achieve. With little changes with plumbing, but these changes are not necessary and the overall concept can still be achieved without these layout changes. White, light and neutral floor to ceilings tiles will seemingly add space to your project, but only a small space is needed to attain your desired plan. Mostly aesthetic appeal is needed, which is why I suggest leaving the layout, the function is already there.. this will also leave more resources to achieve your desired look.