I'd have thought an architect could help you get more out of the space and they probably know a kitchen company to help you with that side of things

Or perhaps a space planner, like OnePlan. https://www.houzz.co.uk/pro/oneplan/oneplan

Alot of kitchen companies only deal with the kitchen itself. If you can find a kitchen company that can do it all then that will be the easiest way. This will involve the planning and the building work, along with styling the space too with flooring, lighting etc.

The other way is ask OnePlan and then you can ask around for the building and kitchen works separately.

Your welcome ... good luck :))

Excellent OnePlan … well done :))