I made the decision erect a stud wall and house a walk in pantry, which will also house my free standing (didn't want an integrated one) washing machine - call it a walk-in pantry/utility area (*area because it's not large enough to be considered a room!).
See plan below. I was limited on options for the awkward alcove in my kitchen and this seemed the best bet. Now to design it. Hoping to go for a more bespoke feel, per the pictures I've included. I did consider placing an actual butler's pantry type larder unit in the space but it would have been too tight.
The pantry will include most of my smaller kitchen appliances (microwave, kettle, toaster, blender etc).
Please include your pics for inspo.