I would at least swap the dining area for the sitting area. Your new views to the garden will be appreciated more often than only at mealtimes. I agree with Kemi but keep the layout open ie don't have the back of your L sofa to the kitchen. You might also fit your woodburner in the wee corner next to the bi-fold doors. I don't know if you can open up the wall between the kitchen and (your planned) sitting room ( the wall adj the hall).

The small cupboard above the sink opens horizontally and is actually pretty inconvenient, so I'm sure that a rack would work well thinking about it. As for the spices, they need some serious decluttering! I'm considering another shelving unit on the opposite wall to hold everything currently on the worktop. Unfortunately, there's no other space for a dining table but I have been looking at smaller expendable models as we hardly use our current one. Extra pull out worktops would be ideal! I'm not sure if there is quite enough space above the white goods but I will have another scan of the kitchen. Hopefully they will work somewhere as the extra preparation area would be so useful. Thanks everyone for the suggestions - super helpful!

lovely nice borders

Permitted Development?