Hi All - taking on board your comments I have come up with three variations. Of course would love your comments! The distance from vanity to WC in plan 1 is approx 60cm - it could be made a bit more. This falls within the guideline you posted (23inches). More space could be created by making the shower a bit narrower (shown on all 3 plans as 1m wide (39 inches). I don't think there is quite enough space to divide the room and the problem with the idea of the bath right in the middle is that on a practical basis we would have to walk around it on a daily basis to get to the shower! Could quickly get very annoying!

Hi Gina, How about if you use a back to wall pan - with cistern concealed in the right side wall - with basin under window - and have a shower valve etc on top wall with a small fixed panel and a pivoting main shower screen area to be opened when needed - but give feeling of more space when not needed .

Thanks for the comments. The bathroom is next door so we can feed into the soil pipe there. The wall where toilet and sink are in the plan above is an outside wall. I don’t think there’s really much else we can do given where it is in the room etc. I’ve attached a plan of the upstairs - you can see the bedroom (with previous small shower and sink. I am aware of not having enough space for knees which is why I think we need to go for a 700 x 900 shower tray and a short projection toilet to give us those few extra mm. I think Sarah’s plan would work? We’re going to draw out some stuff on the floor in there today now that it’s all ripped out and use a chair for a toilet to visualise it!

Personally I would put large tiles on the floor as well as in the shower, as herringbone will mean a lot of grout lines on the floor to get grubby. Then you could use the herringbone tiles on the wall behind the sink and make a feature of that wall? And/or on the wall above the bath (though it would be a hell of a job for the tilers with that slope, but can be done)? The bath panel could be either the large tiles or the herringbone. What’s the plan for the black long tiles - I like the idea of using those somewhere, maybe on the false wall behind the loo? Black herringbone as a nod to the white herringbone but to give a contrasting colour. Are the marble tiles real marble, or porcelain marble style? They are lovely by the way. If they are real marble I would be a little wary of using them in the shower as they are porous and may stain or spall, also mineral deposits can leach out causing rust stains especially with all those lovely veins. Calacatta is a particularly porous marble, more so than Carrara for example. If they are real then I would limit them to wall use (the sink wall and possibly the wall behind the bath as I say above) and perhaps use the black herringbone in the shower instead?