Save the pink bathroom! The original floor and the pink bath are beautiful! And obviously appropriate to the era of your house. http://savethepinkbathrooms.com/ To give you a more spacious feel, have the door replaced with a cavity sliding door - it gives you an amazing amount of extra space, we did it in our bathroom I would replace the vanity, which is obviously not original, with a custom laminate vanity with cupboards underneath in pink (top) and grey (cupboard doors/sides) or even a boomerang pattern for the top (http://retrospaces.com.au/retro/images/laminates/Renovation/FirstLadyPink.jpg) have a skilled tiler repair any areas that need repairing and have the tiles professionally cleaned and re-grouted and re-do all of the silicone, Then replace all the tapwear with new chrome taps but in an appropriate style (like these for example http://www.caroma.com.au/bathrooms/taps/retro/retro-wall-top-assemblies) and a new glass shower screen. A really fresh coat of white paint (use the bathroom product), better lighting - put a light in above the mirror (http://www.ikea.com/au/en/catalog/products/00255303/) and a fan/heater/light in front of the vanity exactly above where you'll stand when you get out of the shower. If the mirror isn't in good shape (or it may be mirror doors on a cabinet? I can't tell) then think about replacing the mirror too. You'll save a heap of money over completely re-doing the bathroom and importantly you'll be in keeping with (and preserving) the midcentury design of your home.

Thanks and sorry for not providing that information. This is a new room ensuite, not a renovation. So there is some flexibility in the window placement. On the wall facing the sliding door the single window is 1m wide x 1.3m high and is 1.5m off the ground. On the wall with two windows the windows are 1m wide x 0.5 and they are 2m off the ground. The floor will be tiled. Many thanks!

I don’t mind your design. Whilst a nice view is good when you look through the bathroom door I wouldn’t compromise functionality to achieve it. I’ve attached a pic of a corner freestanding bath that may suit - easy to install, easy to clean. I have a toilet on the wall adjacent to a bedroom and haven’t had an problems due to its location - installation was easy due to the space and under the house and there isn’t a noise problem.

@dB Emery, I am also about to embark on a bathroom reno myself and my plan is similar in some ways to yours as the room has a similar layout. I, too, have the bathroom door in the middle of the wall which I don't like but its not easy to move. My plan is to have the vanity on one side of the door (same as yours) but I am planning to have the shower on the other side of the door. The bathtub will go under the window so when you open the door, you will see the vanity to your right and the freestanding bath right in front but slightly towards the wall that holds the vanity. The toilet will go on the other end where your plan has the bathtub. My thinking was to have a visually open space when you enter the bathroom and the showerscreen, even though it is glass, might visually make the bathroom smaller. I will try to find my plan and post it here. I do have a question about the showescreen. Have you consulted anyone on whether a 1200mm long single pane of glass will prevent water spray outside the shower area?