A few things I would change from experience...instead of a single and double door I would spend the extra money and put in a bifold corner section...would open up the space so much more. as for the kitchen...completely flip your design...put your breakfast bar closer to the window...make it large and multipurpose with the hob in it and then put your main band of cabinets either left, right or behind? We have recently restructured our existing cabinets to this layout and put in new countertops and it works far better than before!

Another option that I was thinking of, knock the internal glass walls of the conservatory and make the hall smaller - this leaves a very large open plan space (9m x 6.4m) but I have no idea how best a space like this could be used?? Can anyone give me their thoughts here? Need to move if I am to make an offer

If you are worried about the hallway being dark why not have a fully glazed door into the open plan area at this bottom of the stairs. This would allow you to see straight through the house when you walk in the front door and make the hallway feel much brighter and less closed in?

Would to get a colour scheme to match the island units as it’s walnut for wooden flooring and walls and built in cabinetry for TVs etc