Hi all thank you for your comments, the bathroom is 2700 wide (window wall) and 1800 deep- looking at 2D plan from doorway, less the boxed in area to the left of the window which is 700 x 800 which creates the fixing wall for the shower head, and and an alcove for the basin area. As you can see it is a planning nightmare and all your suggestions are very useful, I had thought of closing in the window all together & putting in a skylight, but externally it would mess up the appearance of the upstairs windows that are all the same and look nice from the street view.Always a balance between one decision and another. All other options for placing the shower = claustrophobia and given the room is already so poky, at least a shower floor area of 1370 x 800 will give some sense of space. Ive read up on so many design ideas for small areas, thank you angelasusanm, I'm shuffling papers all over the place as I love proportion and a bathroom with many angles is difficult, especially for tiles to look good. This bathroom is not a redo - its never been completed and so there are no skirtings or wall tiles or anything, the pic has a piece of wood looking lino on the floor.

MB Design & Drafting, I have to contradict your comment about having only 1 floor waste, we have a large double shower with only 1 floor waste, ours is in the centre of our double shower, our tiles are black and by the time we get out of the shower the water on our shower floor is gone, I always clean the tiles and glass before leaving the shower, I leave the fan on while we dry and by the time we are dried our shower floor is almost dry, we have no trouble at all with only 1 floor waste.. Barbara, we have the same problem, which is not a problem at all, my husband likes his shower much hotter than me but we have our showers turned on to suit each other, we have a small seat at each end to sit on while we wash our hair and feet and each others backs.

I'd suggest replacing your swing door with a sliding door recessed into the wall sliding to right. We did that with our tiny bathroom and it opens up all the wall and space restricted by the door for a vanity next to loo with niche recessed mirror fronted storage above the vanity. Go wall hung to keep floor clear for sense of space.

I would prefer to keep the WC separate to the Bathroom as you have 3-4 kids? who will get bigger very quickly, having a powder room downstairs won't help with the morning rush to school., But it's your house so I have added a pocket door between the WC and Bathroom. I have also taken that small robe space for an extra vanity in the WC/Powder room. No width dimesion given for the WC The ensuite could use that extra entrance space as a sit down makeup and hair bench for your wife.