@Chasingsquirrels
if the bathroom fitter/plumber has said it's not a problem, then 2 for me.
I'm 100% behind you not wanting the toilet where it is.
I'm also 100% behind wanting a stand alone shower.
i like space around the toilet, so I'd make sure to get that right, then have the longest shower base I could.
we used to have a window in our shower, ground floor in our garden, and I loved it. It was a beautiful wood frame which I despised having to dry at the end of my shower (I can't stand that kind of fussing) BUT I'd have it back if I could!!
Another house we had the bath under the window, I'm short & that drove me insane as I had to get into the bath to open/close the window. It doesn't sound like much of a deal, but I cursed the designer of that one!!
Idreamed about my new bathroom here, I drew eleventy million plans! Stupidly hadn't considered the floor being concrete (60's build) meant I could have a low line shower base, the step up had to be huge fir run off to soil stack. I hate a hugely high step up for the shower, I think they look so ugly, so I put the shower over the bath. I got an 800 bath, to create a bit more 'elbow room'.
Have you considered putting a skylight in the hallway?
i put one in and the bloke boxed it in for me (at an angle) as it had to go to quite a high point in the roof, via the loft. Best money I've spent on this place!! LOVE it.
good luck getting something you love!!