Moving out in Knightsbridge can feel oddly clinical: boxes stacked in the hallway, lights half-packed, one last look at the kitchen tiles, and the quiet pressure of knowing someone else will inspect every surface.

If you have ever stared at a greasy oven door and thought, "Right, how much is this actually going to cost me in Knightsbridge?", you are not alone.

If you are preparing a high-value flat for the market, the small details matter more than most people expect.