For your new bathroom, a wall mounted mixer and tap will not allow water and scum from toothpaste or soap to sit and build up. If you have your heart set on basin tap ware, you may need a house rule like I do, no one uses the main bathroom basin without wiping it out, including the tap ware every use. Three years later it is still immaculate, unlike the ensuite basin, it's the only nice basin in a home currently under Reno. Ps the kids will often use the ensuite basin to avoid having to wipe out the new main basin ;) the above comment about wiping everything down each time may seem extreme but it works, as well as good ventilation and plenty of sunlight (through window or skylight). Good luck.

Thanks heaps Lesley. We ended up choosing timeless grey as the main render and sticking with all our previous choices. We found a house being built in it literally a few streets away so have seen it in all lights and weather conditions and feel it will look good. Fingers crossed!!

unable to read the measurements clearly but my suggestions include enlarging the dining area, laundry and bed 5 and sacrificing the upstairs study nook to enlarge the upstairs lounge with some variations for bathrooms, doorways and extra storage

yes oklouise, I hear all that - absolutely yes it's all about clients understanding/working out properly what they need.........and it's great to be able to seek comments/thoughts on Houzz from a broad range of backgrounds/experiences......the issue though is when it gets into territory where (from my perspective) clearly experience and professional skill will help resolve the problem most effectively (such as on this particular one) that it's therefore appropriate to suggest this the advised way to go.......I suppose I see frequently here capacity for designers to be able to "cut to the chase" most effectively, but of course this needs to be done in a manner underpinned by a thorough understanding and establishment of what the client needs in context, and yes very often the client will require more time to work this all through.........I however still see our role as relevant in that part of the process though, and not necessarily having to "wait" for that to happen, because ultimately as professionals in this position (i believe) have a responsibility (as part of our role as a consultant) to educate people appropriately and thoroughly so they can develop the skills to be able to consolidate their decision-making most appropriately for themselves and the project - by the end of the journey, I find my clients are rather quite the experts!..........this however involves a collaborative approach, egos are shelved and an intimate working relationship, which is very different from the approach (that some designers work to) which is essentially selling a "product" or particular end result, rather than a service....significant difference, and again, horses for courses ;)