Such a town should have good public transport and streets and paths laid out in such a way as to encourage walking and cycling. Low-traffic neighbourhoods can be designed in from the start, without the rows that tend to break out when they are introduced to existing streets.
Such a town should use the land well, with the sort of densities you might expect to get in Victorian terraces rather than suburban sprawl,
What the tosser means is that no one should be allowed to have a nice 3 or 4 better detatched with a big garden. Because that’s bourgeois, therefore unpleasing to the sort of tossers who become planners and thus Britons are not to be allowed the sort of houses Britons actually desire.