You have a lovely home to work with. I would say don't underestimate mirrors for making a room look twice as big. Have you considered giant mirrors, or mirroring an entire wall? How about the curved wall? I would pay attention to lighting also, as great lighting can make your home look a million dollars and more spacious. I would make a focal point with television resting on a gorgeous storage cabinet, place wall picture frames on wall where tv is placed, this will draw attention to the art and cabinet rather than the tv itself. I would get highback armchairs and use them for both dining and lounge seating with a sofa. I like those Victorian card tables on wheels, that fold up, multipurpose. Only buy furniture you absolutely love, don't follow trends, follow your heart, after all you want to feel good at home. Don't be half-hearted follow your dreams, be confident. When you fully execute your interior passion you'll be happy and others who come to your home will sense you and credit your style as being authentic, true to you and they will love it as much as they love you.

Ok. Where do you enter? And where is the bathroom? Bedroom is upstairs? Fireplace will be used as such? Is the space next to the sitting room a hallway? Where could the soil pipe go?

Hello nehajo, You have an amazing blank canvas so some questions to help: And there are soo many interior styles so some questions to help: What is your style ? if you are not sure then What colour is the sofa and the style. Do you have a photo? What are the other furniture do you have ? Any photos ? Do you like colours pastels or brights ? What are your favourite colours ? Do you have a favourite shirt, skirt, jumper that has a pattern or style to it? photo please. Do you have a picture or photos that have a coloured frame ? What colour? Do you like plants ? or you have any already ? Are their any sentimental objects ? what is it, description ? What is the rug you want to buy is there a pic of it ? Are you thinking of some sort of fire, faux stove, or a TV for a focal point in the room ? Do you want to have a workspace in the area too? Oh do you have kids if yes then storage for toys etc if older storage for games consoles, games ? MMMmmmI think that is it to start. Cheers :)

If budget allows i would move the living/kitchen wall to the right and create a single line utilty with wc off of it. moving the entrance for the open plan room to the hallway and if you could also widen the right wall between the current living and dining room i would put the kitchen with island in the living room and seating and dining overlooking the garden.