On my screen your sandstone cabinets (that I really like) and your floor are a warmer color, and the grey you are considering is a cooler color. I would instead consider having the color on the cabinets color matched by a paint company and have the walls painted the same color, or perhaps a couple shades darker. I am unsure what to think about the different color on the front wall. Could you share more pictures of the flat? Do you have furnishings, rugs etc that are coming with you, and if so can you show us more? Your personality needs to be reflected in the choice of paint colors.

Point of information…this is the North American Houzz. Most of us here are in the U.S. There is a UK Houzz. You might want to search for it. I don’t think Dulux paints are available in the U.S.

My personal preference is to add actual color to your kitchen…not, white or grey of any kind.

Please no grey. It’d detract from your gorgeous cabinets and lovely floors. Maybe a light sage green?

I was thinking green as well.

FWIW I think the comments above about gray are spot on