strongly advise against putting toilet in the bathroom-we did this when the kids were small -now they are teenagers, its a nightmare. consider a custom made vanity, with a shelf that runs along the wall over the bath. you can store things in pretty baskets, etc, and virtually halve the floorspace the vanity takes up. you actually gain some bench space. also consider the size of the vanity basin-often the basin is actually much bigger than we need - if all you do is wash your hands and brush your teeth, a smaller one (square) is just as/even more practical. if you butted it up against the bath, you could easily gain an additional 30 cms in your shower. can you put a pocket door in the wall next to the shower? so you walk in facing the bath? then this would give you an entire wall to hang a really long towel rail? we made our own, using a curtain rail and shower rail hooks, which runs the full length of the room, and extends over the bath. and you could always hang another one up higher, that the adults can reach. or if you are talking about a remodel...turn the bath 90 degrees along the wall where vanity and shower are. put shower next to it under the window. put a vanity where the current shower is. plumbing is all essentially in the same place, so probably not much difference if you are wanting new fixtures anyway. think this would actually be the best idea. good luck

We just finished renovating our 22 year old main bathroom that we included when we owner built our home. We originally had a massive corner bath complete with step to get in and not once in 22 years did we use it. At the opposite end of the bathroom was a much smaller shower which four of us used every day. When we decided to redo it from scratch, we swapped their positions, making the shower enormous and putting in a 1500mm free standing back to wall bath - ONLY because the bathroom is big. When we redo the second bathroom, which is much smaller, which has a shower in the bath, we are doing away with the bath altogether. Waste of space and money.

@AAB That Ikea one looks like it has good dimensions from above, but I think you'd find 20cm too shallow to double as a useful laundry tub. If you could find one that was twice that depth… I did encounter such a sink in a long-stay apartment hotel I stayed in recently. The bathroom was fitted out with a combined washer-dryer unit and the "basin" – while styled aesthetically like a bathroom basin and oval in shape as well as rounded in cross-section – was really big. You could have washed a large baby in it! So clearly that kind of thing is available. It did require a fairly deep vanity to mount it in, but that was there to accommodate the depth of the washer-dryer anyway. The only thing with a deep vanity is you absolutely need to mount the mirror on a cabinet to bring it forward, not directly on the wall. If you don't do that anyone who is short and/or short-sighted has a hard time using the mirror for practical purposes such as shaving, inserting contact lenses, or applying makeup. (Yes, I discovered this during my hotel stay too!)

Prospective reno company has thrown in the idea of a wetroom with the same layout as this pic https://www.houzz.com.au/photos/ross-beach-style-bathroom-brisbane-phvw-vp~145174044 It would remove the current problem of the bathroom door & shower door crashing into each other and crushing small kiddie fingers. We don’t have as much room as this sample pic, only just enough width for a standard bath. So perhaps the door would now be whacking the kids in the back as they brush their teeth. I’ve never had a wet room. Thoughts on functionality for families? Canberra is cold and I instantly thought “we’d lose the nice warm steaminess of an enclosed shower cubicle on a freezing morning” but what do other think?