Ok, don't like the dark cushion, don't like the TV in the bedroom. You could go for pendant lighting using the same 'material' as the mirror? If you went for larger beside lamps while you have that mirror there, they would be fighting each other. In the programs I watch, they say to have 'a hero in the room'. In this case the mirror is the hero I think. Also the extra throw cushion for the bed could match one on the chair, so it ties in (or don't have one at all on the bed). If you did need a TV what about having one installed on the wall to the right of the chair,(looking at the photo) and make sure it can swivel out, so when you aren't watching TV in bed it can be against the wall, out of the way. Then you can have a lovely (glass) ornament or two, or a bunch of flowers sitting on it along with your photos. I love how you have your bed dressed, spot on! (without the dark cushion) I absolutely adore the blue shades in the duvet cover and I would draw those out into the room. Love that you have opened up your windows in the lounge. Maybe a throw rug and some colourful (same colours as in the duvet cover on your bed) cushions on the lounge suite as nothing is really popping! There doesn't seem to be any colour except for the flowers and the photos. Colourful paintings on the wall would be lovely too. Maybe the potted plants could be in coloured (as in your duvet cover) pots instead of white. I know you weren't asking about the lounge and if you are happy with it, then that is all that matters. Well done.

I think you could get the telly put over the fireplace. Might need a mantle to deflect radiant heat, not sure. But on the cables and power, I imagine they can get that sorted. Im guessing there is a wall behind you when you took the photos. I agree that a low corner modular sofa would look great. Just don't get it so long that it is up against the fireplace wall. Placed into that corner of end and piano walls . Then pop your cute chair where the sofa is now. Large ( big enough for the sofa front legs sit on it, I'm guessing 2x3m or even 3x4m) patterned rug to define the area. Can you move the piano to another room or against the computer area wall? Can you make the small windowed room the homework hub? Imagine a long bench against the window ( Ikea do a good cheap range that you make to fit your space). Ensuring the computers are in line of sight from the kitchen(?). Pull out the table to give it more space around it. Or flip it to run the other direction. Hard to tell from the pics the dimensions. Paint a lighter shade as mentioned before. A sketch of your floorplan would be really helpful :)

You can get gas fires now that don't need to be built in and don't need to be flued - so you can take them out of the room in Summer so they are not in the way. They run on ethanol and may be the go to save space. If you don't want a gas fire there are better, and more cost effective, heating options but that's up to you. I'd put the lounge a few feet inside the wall on the right wall (as I'm looking at the plan) and, if you move the door you can have the other chairs and table L-shaped around the rest of the room - left and north with a nice big carpet in the middle of the room. You might need another little side table for the lounge unless you are having an occasional table in the middle of the room. Just make sure you'v got somewhere for everyone to put down their drinks within arms reach.

It keeps life interesting to have a Summer setting taking advantage of the view and outdoors, then a Winter setting keeping thoughts inside. The room seems large enough to cater for a few seating arrangements. A 3-seater sofa and two armchairs (which can sit together with a small table between) and a coffee table in centre (to cater for kids play time (have a shelf underneath to quickly hide toys in a basket. Then in Summer the 3-seater with it's back to thecupboard wall - although leaving traffic space and maybe a table where the heater was for flowers and framed photos. Then a decorative chair or two to add spice - even a couple of dining chairs look good against a wall, they can look like artwork. Image 1: this is a clever way to hide a TV. Image 2: interesting chairs together Image 3: Great wall unit and tonal colouring. TV's come as mirrors and artwork these days. Image 4: Dining chairs against the wall and walk space behind sofa to outdoors. A TV is behind the sofa, so not being the focal point.