How to design a city?

this is wrong. the City of London has grown "organically". Most of the rest of london has been designed. Covent garden, Soho, Mayfair, Fitzrovia, etc not to get into the Victorian suburbs.

Sorry - being pedantic.

To be pedantic right back, individual areas have been designed, but their placement and the interaction between them is still fairly haphazard. Apart from south london of course which goes rows of terraces, park, rows of terraces, park, rows of terraces, park, Brighton.

edited to add that the place in the pictures above looks bloody awesome!