As each station was different, Paoletti assigned a different architect to design each site, with different amounts of funding.
The project required large, easily legible spaces, making the most of natural lighting to make travellers feel at ease. In addition, it was important to provide clear, easy, direct routes for passengers; there had to be enough escalators, grouped together in sets of at least three. Finally, it was necessary to construct a large number of protected emergency routes and glass screens on the platforms of stations between Westminster and North Greenwich.
In view of the vast scale of the project, Paoletti asked his team to come up with rough spaces and structures with no elaborate finishes: this was not the place for bold statements.