Dundas east of Adelaide (EoA) is probably the closest thing London has to a ghetto. The city has been pumping in money to try and fix it up however.
https://www.google.com/maps/@42.9892586,-81.2301692,3a,38.2y,91.75h,87.97t/data=!3m6!1e1!3m4!1sm_QjvG74YrJP9eJ6B1ABXg!2e0!7i16384!8i8192
There's...