I am not the best person to comment on lights but would a few downlights be the go or one of those integrated heat/fan/light things be best in centre. Also a lot of people have task lighting......so lights just above the mirror for makeup etc. Personally too bright lighting while doing makeup sends me into a spin as I look like i have about a month to live! I hadn't thought of approvals for my proposed window - so thanks for that. Must keep that in mind. My bathroom is very hidden and looks nowhere in particular. It is all looking good. On another note my friend got a heated towel rail and much as I hate wasting power it is fab. Our towels seems to stay dampish in uninsulated BV '60 box in Melbourne. Also i would have a look in bathroom showrooms for some ideas too if you have any handy. Or buy a bathroom specialty magazine. It is going to be so nice this bathroom. What tiles etc?

You could use this great looking tile as your vanity splash back, your shower recess or rear wall and use a standard lower cost coordinating white tile as a secondary filler. Like he main walls in a satin rectangle laid in a stretcher bond like a giant subway, rectified with minimal grout, and then this gorgeous tile with a mid grey grout to emphasize the fantastic form. It would make for higher impact of the feature tile, and add functionality by fully tiling all areas. Easy to clean, reduces moisture related issues or even just unsightly condensation and cleaning scenarios. Mould retardant additives can be put into standard paint, although in a bathroom, I'd go a low sheen white with mould retardant for this reason. Low sheen should be flatter than satin, little shine at all, but equal to a matte tile.

lots of advice in response to your question on Google...i like to align with top of vanity at about 850 to 900mm above the floor but, if you need a towel and grab rail for safety of disabled and elderly there are specific recommendations but main criteria should be comfort of main users and size of your towels

Yes, your towels will get a little damp opposite a rain-style showerhead. If you are determined to have one of those, it might be worth looking at enclosing the shower. You could always make the shower space wider rather than longer, then you will have a dry floor area to put your bathmat, instead of right behind the door! The towel rail could then go across the middle of the wall and have the opportunity to dry properly (especially if you get a heated one).