Hi - its such a big and important project, i really think you need to sit down with a good kitchen designer and fully tease out your requirements and then look at every possible layout option. by sitting down with someone, they will draw each possible layout to scale in front of you and that way you will be able to see the pros and cons of each design. it makes decision making much easier best of luck with the project Barry

Picture 1 is of existing layout and 2 is my riposted reconfiguration

Hoping to knock the wall between the kitchen and the sitting room . Want an open plan kitchen dining room and sitting room .. Also struggling to figure out what to do with three doors utility , kitchen and hallway door? For a renovation .

Might be an expensive option but could you create a short (?glass) external corridor from the dining area into office by going outside the existing wall, ie come outside of the dining area and turn right into the office by putting a door where you have a window in the 1st plan. I don’t know how that would work with where your patio doors are. Maybe you could shift them to the right, have a short section of wall to the left of them and then a doorway (poss no door needed) between that and the corner of the dining/utility/office