My first idea was to create a galley by simply moving the door to the utility. The kitchen could then be opened up to the dining room. My second idea was to keep the dining room separate but steal a little room from the front facing room (bedroom?). The benefit is that you get a deeper room that allows you to have an island that faces the garden. At the end of this island I have put a breakfast/ drinks area. I think this island and the garden door tick the box for social✔️ This is the more expensive option as likely putting in these doors (which are likely bigger than your existing windows will eat up £4/5k. If you did the second option you could still open up the room to the dining room. Furthermore you might think the Back door becomes redundant and use this space for the washing machine instead of putting it in the middle of a kitchen run. Option 2 is my favorite but there are likely many options and you might choose to find a concept planner who, for a reasonable hourly rate, will give you a number of options to consider.

Wow, looks amazing!

Well done! Sometimes if carcasses and outside of the kitchen are still great quality, respray option is a great way to facelift the kitchen look!

Sorry for the delay in responding to the comments... Unfortunately, the after photo was a little dark and really doesn't show the transformation in it's best light - if you'll pardon the pun! The original kitchen was in an annex extension which was demolished, whereas the new kitchen forms part of a new, larger open-plan space. The tiles are Italian porcelain (check out tile suppliers on HOUZZ or alternatively someone like Topps Tiles who may do something similar). There is a mirrored shelf unit about the sink. We designed the internal refurbishment for our clients and they sourced the kitchen from Devol Kitchens. Here is a better photo (probably the one we should have used first....)