Great ideas.. Thanks!! I agree, I'm planning not to paint the panels since that also seems to be a unanimous decision :) I'm planning to rip off that old carpet and put in hardwood. Fabric shades and co-ordinating window seating sounds like a fantastic idea. I love the antique fireplace cover idea. Any good sites for that ? I love chesterfield sofas too. I have a oriental rug in maroon, but that might make the room darker. Will have to look for a lighter rug...

Nice desk and you have a good space! Ergonomically -- Make sure your chair is adjustable in height, for best comfort and functionality. Also, if you get a chair with arms, and it is adjusted to the height for you to work at the desk, will it fit far enough under so that you don't have to lean forward to type, write, etc. With that carpet, you'll want casters on your chair to prevent snagging the carpet. It looks like a Berber weave, which snags easily (I speak from experience, having had that style in my previous home library). For decor -- Do you need any shelf space over the desk? Floating wall shelves can be installed in multiple sizes/arrangement and can be used to mix practical (books) with decorative objects, art or photos. After you decide what to put on the walls, consider a good desk lamp that is both functional and nice. You'll likely want a nice trashcan for paper, and perhaps a small paper shredder. Mine is very small and discreet, as I shred the occasional paper and credit card. Do you need a printer and table for it?

Hi miyajima 2018 - You are very welcome! What color to paint your walls will depend on what accent colors you choose. I do think that painting the walls an obvious grey would be too much grey. (Especially since it does rain a lot in London!) What are the paint manufacturers that you have access to in the U.K. so we can tell you specific paint colors once you tell us the colors with which you would like to decorate your lovely new home? As for your other colors, so there is no misunderstanding, maybe you can upload some photos of objects in the colors that you like. They don't need to be furniture, they can be anything, a something from nature, or a room that is not your style, a piece of fabric, anything at all, just tell us what it is you like. For example, I recommended a paint color to a fellow Houzzer as looking like a pomegranate and put up a photo and another clever Houzzer found just the perfect color to match! If you have no idea where to start with your color choices, you can go to an art store and buy a color wheel for a few pounds and play with it, or you can look on line for one. If you only want blue, then you could have a monochromatic scheme, plus the dark grey calmed by the soothing, earthy neutral of your wood media unit and a wood or wood top dining table. You could have a white sofa with throw pillows in shades of blue in textural fabric such as velvet or suede. If not a white sofa, you could get a very light grey sofa, too. Do you know which blue you want? The rich blue of a Sri Lankan sapphire is marvelous- in the color thesaurus, http://mentalfloss.com/article/75713/name-every-shade-rainbow-color-thesaurus it would be either cobalt, lapis, or azure. Look how that blue goes with turquoise and greens , if you want to go into additional color. Doesn't the above remind you of a peacock feather? I just love those! We have only to look to nature for marvelous color combinations! I don't know how much mid century modern you want to go, but you could get a dining set that has the clean lines of the Scandinavian designs and mid century modern look, such as the set in the photo I posted above. You could also get a side chair reminiscent of one of the mid century modern icons such as these, or others. And brighten the space with other mid century features such as a starburst mirror of which there are many types. And for a fun pop of color, there is this Eames wall- mounted coat rack which also comes in wood if you want a more serious palette

A chair (or two) with an ottoman and a table would be great, especially if you are sometimes able to work while sitting in a chair with your coffee, tea (wine) on the table next to you. Is there any way to turn the desk so your back is not to the door and windows? That would bother me. It seems the shape of the desk fits the the way you have it but I wonder if you could turn and float it? If that worked then you also would be able to sit at the desk and talk with someone else in the new chair....I do see you don't have clients but I know my DH comes into my office and we chat. I don't work from home but bring work home and he sometimes comes in while I am finishing stuff up.