hi, my sister in law has a very similar sized kitchen to u and shebhasbso much storage she even has empty cupboards!! she put her sink infront of the windowbwith the hob opposite, to the left of the hob shebhas a tall unit with her ovens in it and the otherside she has her fridge and then 2 base units and 2glass display wall units. on the far wall to the right of her sink she has wall units, and to the left of her sink she has a stretch of worktop similar to ur plan which leads to a peninsular island that steps down from her worktop height to create a table. would love to see some pics of what plan you go with and the finished result

I like the layout as it is, with your proposed changes, I specially like the incorporated breakfast bar around the island. What are you using for extraction for the hob?

Something along these lines could work - and give you better room between range and island and allow the fridge freezer to be opened fully ... extra cabinets in the dining room provide additional storage if required... I’ve added images into a shared folder with public access for you. Hope it helps ! ( WM as integrated one with mock drawer fronts under the boiler cupboard ) https://www.icloud.com/sharedalbum/#B0I5X3iPcJIINj6

I would suggest to add window on utillity room to make it bright. If it were me i will move the sliding door to the left and make it smaller to give room for placing couch in the back and move the door that leads tot he garden adjacent so theres room to mount a TV. I will design the bathroom like this and separate the coat and shoe storage to not making too many hallway, if you dont have lot of shoes you can use low shoe cabinet and open up the wall on the side of front door to make hallway bigger Make the storage door open to outside of the room so you can fill the storage full without getting hard at opening the door The back room feel cluttered because the table choice also flip the sofa on living as it will not obstruct people walking to sit