Both options look great but your toilet should be 400mm from its centre to a side wall so not sure if you can enclose it with a standard 90 mm wall. Maybe frosted glass ?

the challenge is to allow enough walking space between fixtures and to retain some daylight without having to alter the window so my suggestions include a custom sized shower space with sliding glass doors to avoid problems with overspray, a toilet alcove with privacy wall, a double vanity and about 1.8m wide extra wall space in the wiw and adding a new toilet location with drainage through the external wall instead of the floor should be easier

Can you add a few measurements

Thanks for the ideas! Kate, unfortunately I only have a couple more extra measurements and the rest here are some assumptions that might be out by a bit. We are still going through settlement so can't whip out the measuring tape again for a while :) I like the layout you've proposed OkLouise we hadn't thought of that at all, problem might be that between the door and the external bathroom wall might only be about 700-800 so could be a slightly narrow shower, maybe that's fine in practice though. The private toilet and use of light is a good idea.

The bedroom itself is really shallow only 3.1m so there isn't much space to have more storage at the hallway wall/foot of the bed and we will definitely have a king size in there

we've used 700mm x 1100mm for a comfortable shower and you could add bigger chests of drawers beside the bed for extra storage

You might be able to shift ensuite door 100 mm or so towards wir as new closet won’t need the full depth of the toilet space