So the bit in the light blue circle looks like a cupboard, perhaps with a stacked wachine machine/tumble dryer in it? (good idea if so). But do you mean just past that cupboard, ie along the left hand wall as you come into the kitchen? If so then yes you absolutely could put the fridge there, it’s just going to be a bit bulky as will stick out further than normal units, and you may feel it’s in the way a lot as that’s your main way in and out of the kitchen. Also it wouldn‘t be able to go right in the corner, it would need a slim unit to the left of it so you can open it fully. So that would push it further towards the island and again that means it’s blocking the main walkway more. You could however push the island further towards the garden than shown in the plan, which would mean you have more space in that entrance area, and then it is more feasible to have the fridge along that left hand wall, as people can get past. Anyway, there are certainly options, it’s just worth planning the kitchen layout and checking it all works ergonomically before you commit to the window! As regards kitchen units under side return: you can have wall units or tall units under a side return, it depends how you make the roof. It’s true though that most people prefer to leave that wall clear of wall/tall units, usually that’s where a dining table or sofa goes. Here are some pictures of side returns with tall or wall units under. The first one looks the neatest as they have the roof part glass part solid and have tucked the units under the solid bit, but I suspect they have an unusually wide side return:

Hi there, it would be good to see the layout of the next floor - as the comment above says, you bathroom is probably above the kitchen so all pipes and waste is running through that wall. If you were able to, i would knock down the wall between the kitchen and dining room, and leave the location of the kitchen where it is, but make it bigger and possibly incorporate an island as well. Let me know if you would like to chat further about options available, and designs of the spaces. Kate - Xenas Interiors

Thanks for the reassurance Sarah. It definitely was a concern but personally I’d rather go upstairs to the loo and have a really lovely dining area. I’m keeping the kitchen as is and just adding more cupboards and nice shelving. I’ll use my budget to change the work tops and install ufh. Right now we have black granite worktops so I feel a bit bad getting rid of them but I would much prefer the bottom cupboards being a dark colour instead of cream and having quartz tops.

Some ideas: 1. Kitchen layout quite similar to what's already there. Island about 306cm long, as 320 is the max length in most quartz brands. Coffee corner next to stairs, sink optional (because plumbing..). Also made some changes in the utility, created a separate shower room and shared wc. Tall larder units, extra freezer, imagine it's all there. And of course some tall units and a bench for coats and boots at the rear entrance, opposite a laundry. 2. Peninsula kitchen sideways, which allows a very large dining table (took this one as an example). Had to move the door location towards utility+study. 3. Something different. Moved the kitchen to the side to create a large dining room. Added an opening in the dividing wall to add a bar with seats. Added some length to the 'tv wall'. Hope these may inspire. Feel free to contact me for questions, requests, donations.