London will begin a Green Bin program the week of January 15, 2024.
A Green Bin is like a blue (recycling) bin, but for food waste such as fruit and vegetable skins, meat and chicken, spoiled leftovers, and other inedible food waste like bones. The Green Bin would be collected from your home at the curbside much like your Blue Box is.
(The green bins were delivered in my area (Hyde Park) this week.)
You can buy either large compostable bags to line the entire bin or use small ones you tie shut and than toss those into the bin.
Also I see they mentioned Bones, that’s something your backyard composter won’t get hot enough to deal with.