I don't believe very much in our area goes to landfill. Home refuse is segregated into food, metal, glass, paper, materials, plastic, garden waste, we only get a very small bag of other waste. Each of theses is collected separately (do not go in same truck). Garden waste is composted and you can buy it back - had 5 ton last year.
At our local tip, again everything is segregated, even more so than domestic rubbish.
Landfill is very expensive for councils, they do not use it unless there is no choice.
They Blaby tip has similar segregation.
Most of this has come in over the last few years as landfill has become a dirty word (word play there)