Option 1 is fine but you have no vanity space and these tend to look poky in smaller bathrooms. This is a smaller bathroom, this can be eliminated with say frosted glass walls. But you are changing a bathroom for one that is similar sized, worst case mirror the WC over so it gets some ventilation. Option 2 are you kidding me a full length window in the shower? where is the entry to the master? is it coming off the living room? Option 2 good use of the hall, but the planning of a free standing bath in this small main bathroom will make it appeal smaller is there no shower in this option? If you are going to the expense of making wall changes, what about taking the bath out to the eaves, if you have them which will give you 600 mm more space? If the master is coming off the living room? If the overall internal dimension is 4.2 M and you need say 900 mm for entry to ensuite and 100 mm walls, that leaves you with 3.2 M for ensuite. Looks like you are taking out lots of walls, so to me if you changed the access to the WIR and ensuite to the other side, the vanity can be near the full length window, which solves the water issues of it being in a shower, and it would be nice to be pushed out the 600 mm like the bathroom, and if you were willing to give up say 300 mm of space from the bedroom side, 4.2 x 3.1 than you could have hanging space (which goes into that proposed new access point), on two sides and then a total wall of storage in shelves or drawers or places to put shoes and bags and ties and smalls on the ensuite side.

hi we have about six months ago now, re done our bath room , similar size to yours, and , i can take some photos and email them to you , we have maximised space, and walls , put in a white stone bath under the window , it is a metre in width , with a cool water spout coming off the centre under the window we pu t afalse ledge in to sit , candles etc on , , we tiles floor to ceiling, off white , wall mirror cabnit with three mirrors , inset into the wall so its only sits out a we bit from the wall tiles , floating bath room vanity , so that it makes the floor space look bigger , . matching stone square basin sits ontop of the vanity to one side so plenty of room to sit all your bath room stuff when need be , seperate shower all tiled as well , with inset , shelves for shampoo etc, also , when you open the bath room door and walk in when you close the bath room door behind it next to the shower is a very narrow floor to ceiling shelvec for towels, now the hole is there we jaust havent got the shelves put in yet. , we gt loads of comments as the bth room dosent look small evn though it is , , most expensive item the sqwat extra wide stone bath , made to order basin / tap ware and shower spray thing ,oh and the white stone vanity which we had made to order as well , due to the sizing .

Hi bigreader. It's not the tiles in the niche that are the problem. In fact, one piece of tile (30 x 60) will fit perfectly with no grout lines. It's the wall tiles around the niche space that will not line up with the side edges of the niche

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!