When we bought our place we swapped to a frameless shower to open up the bathroom and get something that we could "live with" until we could do a major reno - what we found was because the shower area was very small (under standard spec) and had a pretty crappy fall to drain, so depending upon who used it we got a little water spread or a lot of water coming out. Check the fall of your floor to the drain and install a low flow shower head. Also check where the shower head is pointing during your shower - angle it away from the screen door - sounds obvious but because there is a small gap between the stable screen and the door if your shower is hitting that (either directly or with run off from your body - elbows out when you're washing your hair for example) that water will run straight outside. Good luck.

Thank you :) still a bit to do, so will post another photo of the finished product (when we eventually get there!). Unsure of the cost of the skylight as that was already installed when we purchased the house. The floor tiles are standard 300x300 rectified porcelain, and the wall 300x600... I'm sorry I can't remember the names of them. They were purchased from Swan Ceramics in Perth though. If I happen to find the receipt I'll be sure to post on here the product names :)

This with the extra width you suggested the built in bath with a large shower space next to, the shower head coming off the opposite wall to help avoid water to window, the window would be best tiled, the wall with the shower door into "The wet room could be all glass up to the vanity. There are several suitable places for towel hanging and an extra storage cabinet could be above the toilet, I forgot to add this

Kath, I use these on my shower screen after every shower, best product ever, they wipe the glass sparkling clean and leave it dry, no streaks and you will never use a squeegee ever again, it takes only minutes to leave your bathroom sparkling, I use them on the fixtures and tiles as well, just hang out to dry until next use.