It looks very cool and bright! Lots of free space and a well-designed cooking area. I like the way it's separated from the table. The colors are just as well chosen. I will keep it in mind for the future!

I think you could take the wall down and still fit everything you want into the kitchen, I'd be inclined to put the fridge in the middle where the breakfast bar is now and build the whole section floor to ceiling as a pantry alcove, you could then remove any other wall units and maybe put the stove in front of one window and the sink the other. Or you could decide to do away with units along the window walls and have a double width central bar with a stove at one end (furthest from the dinning room) the sink at the other and have space for bar stools and along one side. If you wanted to see what it would look like and plan it out first I specialise in interior designing using 3D modelling so you could explore what its like before you do anything. I do it all remotely so let me know if you'd like some help :) If you want to see what a walkthrough is like this link is for one which included a kitchen, open plan dinning room and living room. https://youtu.be/9YmlXjlnLSs

I would be tempted to take the kitchen all the way across into the current Sitting Room which will give you access into the Conservatory and garden, but by doing this would it allow you sufficient space in the current Dining Room which would then be your Lounge? If you make the kitchen/diner a big social area and have sofas in it and also perhaps in the Conservatory too then you could make the new lounge just an occassional room?

Hi, You'll still need to vent to an outside wall, which might not be easy and you shouldn't really go down then back up with the ducting. It need to go down then level through to an outside wall. Other than that you can use charcoal filters, which won't be so effective. Ceiling extractors tend to work a little better though you'll still need to vent to an outside wall, though this is often easier than going the floor route. Hope that all helps ... good luck :))