We have squeezed this bathroom into a tiny space of only 1.7 by 1.3 metres - that's only 2.2 sq metres. Thus the layout had to be very precise and fittings chosen - to fit exactly the available spaces.
The old bathroom was open plan, installed in a landing between the floors - very odd solution, as you had to close both top and bottom stairwell doors and nobody would be able to get from one floor to another without disturbing your privacy. We have carefully measured the spaces, and the customer supplied the right size equipment. Although the bath was by 5cm longer than the space between the walls, we have squeezed it by chasing into the side walls and creating extra space - it was a question of few millimeters, whether it would fit or not. After bath was installed, we constructed a partition to separate bath space from the landing. We gained more space for the landing by removing part of the stairwell partition (still having enough space to comfortably use the stairwell). Afterwards - installation of toilet, wash basin, towel rail radiator, tiling.
Below are the images of how we progressed: