Firstly the design was only concerned with the aesthetics and there seemed to be very little concern for how the thing was actually built, the issue with the fixing down bolts could have been avoided if the frame was designed to be free-standing and the frame could have been designed so that it was easier (and therefore cheaper) for the metal workers to fabricate.
**Edit- these changes to the frame don’t have to affect the aesthetics, but can save a lot of time and therefore money by speeding up the build and making it easier for non-specialist -Edit**
Secondly it’s quite a large building, but is only a 2bed house, considering how expensive space is in London it seems to be wasting a lot of it (but I’m probably missing the point there!).