Okay.I think putting some bright coloured cushions on the sofa( you could maybe keep some of your existing ones and just add a few new ones) would help. Also on the long wall where your tv sits I would buy a long unit,I'm thinking you may have to leave your tv where it is as the way your seating is arranged it looks like you will need to leave it there. You could put family photos and a lamp on the unit if you so wished. I have one with drawers and it's great for storage. The curtains are nice but I think all your colours are blending together,maybe changing these would give a whole new look to the room.

The kitchen is very tricky not knowing whether you can reuse any of the cupboards and worktop... Move the washing machine to utility and install cupboard. Move the oven to the left of where it is now. Install shelves on the back of the kitchen wall. I'd keep the dresser where it is. If you did have to get some new units maybe consider a U shaped where the bin is now, you can always mix and match. The dining table can probably be swung the other way and moved away from the wall. There's a 4ft gap between the edge of my table and base units which is fine. I'd get 2 x 2 seater sofas and have them at right angles to the fire away from the walls with a coffee table in the middle. I'd get a smaller tv, sorry.. Leave the tv on the right wall but put in a cupboard door on the left alcove to match. This does mean you can only watch TV from one sofa though. If that's a problem then try an L shaped sofa on the left hand wall if you're facing the fire. Either of these options should leave you with room for cabinets against the walls for storage. Are the windows deeps enough to use as window seats?

I love how you've kept the character alive in a tasteful eclectic mix. I think you may like a splash of colour in the bathroom by adding a canvas roman blind in a bold teal with a coordinating runner rug and some luxurious towels. A wall mounted rack for folded towels above the loo, will interrupt the monotone of the wall as may a plant or some. Also some woven floor baskets or quirky toiletpaper or magazine container to add interest.

Are you likely to extend in the next few years and therefore want a cheap solution “for now”? Or are you unlikely to extend in the foreseeable future so want a permanent better solution (more expensive than a temporary fix but not as much as a new extension)? For a cheapish “for now” solution I would suggest putting a fridge where there currently is a storage console table in the pictures - ie next to the (?) coat rack. You probably have space to put some extra kitchen storage around it too. That way it‘s a bit more accessible than in the utility, and you can have a dryer and more space in the utility. Is that your dining table, or the previous owners? It’s pretty giant and swapping to a smaller table would give you more space to put in a dresser or sideboard or other storage somewhere near it. Or even a built in wall of storage across the wall with the sitting room (if you don’t mind blocking the internal window). For a more permanent solution, I would agree with the suggestion of moving the whole kitchen to the other side of the room. You could have an L shape kitchen along the sitting room wall and side wall, with an island. Much more kitchen than currently. Then I’d probably put the dining table in the middle of the room and make the ex-kitchen area into a snug with small sofa. I‘m not suggesting any changes to the utility purely because from the plan it looks as though it’s got some serious supporting walls around it (perhaps the original end wall of the house) so it will be very expensive to change it. If I’m wrong about that, however, it could make sense to knock through into the utility to buy yourself more kitchen space, and then carve a new utility off the back end of the very large study.