kinda depends on whether the wood floor goes with the kitchen. Personally I like to see the same floor throughout as that continuity does make a home seem bigger and help with the open plan feel. However it is perfectly acceptable to have a different floor treatment in one room as long as they are completely different materials.

The best advice I could give you would be to contact a structural engineer. They will be able to tell you if a wall is loadbearing and, if so, how best to support the wall above (e.g lintel, steel beam etc.)

They should absolutely have put acro props in. These are steel props which look flimsy but carry a surprising amount of weight. My mum's just doing this with her flat. The buildings inspector came round and specified how many props and where they had to go before anything was touched. The RSJs were specified by a structural engineer and also passed by the building inspector. It's a vital part of getting it passed by building regs without which you'll have serious problems when you come to sell, even if it is safe. If there are acro props up, get in touch with building regs before it goes any further.If there are no acro props up, phone another builder and ask them if they can put some props up ASAP. A good builder should automatically prioritise it over any other jobs they have since it's a super quick and also urgent job but will probably want it in writing that someone else took the wall down. Also get in touch with building control (building control is the department which issues building regs and will send a building inspector). The exception to all this is if the wall is not structural but that's unlikely if there's a floor above it and impossible if there's another wall directly above. Also, your builder must by law have public liability insurance for if this sort of thing goes wrong. I can't give any sort of time frame for this. It's likely that any damage is already done but possible that cracks are propagating over time and may cause more damage if you leave it. It's entirely possible everything will be fine even without props. I've seen some awful things including a case where a man with obvious mental health problems took out all the walls in the basement of a 3-story building without using props and it somehow still didn't fall down.

First of all removing all the stuff that doesn't belong in a living room will help. The living room feels like a closed off space because it looks so different compared to the dining room and kitchen. Everything is white and has a nice tiled floor. I would suggest continuing with this in the living room or you could put the wallpaper from the dining room in the living room as well. Having a floorplan would help when designing the space, but I'll try my best without a floorplan. Where the fireplace goes I would suggest letting someone make a custom cupboard. You can hang the tv on the space above that cupboard and make that the tv station. I would remove the sofa from the wall and move it closer to the "fireplace". Add a nice carpet and a coffeetable. Add a floor lamp and pick a different light fixture. If you want you can also create a seperate reading nook. I hope this helped.