You get a chance to fit a Grade II* listed Arts & Crafts flat – still with many of its original 1909 features – to your liking and your needs. You could even flip the layout back to its original 1909 ideal to capture some of M. H. Baillie Scott’s original vision.
You could even squeeze an extra bedroom from the flat, make it a two-bed, but why lose the openness that the current space provides? The openness reflects the openness of the private gardens that surround it, the same openness that extends across the Heath Extension and Hampstead Garden Suburb, and beyond to the Kenwood Estate and Hampstead Heath.
The choice is yours.