Sheffield: black wheelie bin for the incinerator/energy from waste plant. Blue wheelie bin and blue box for paper/card or plastics/metal/glass, optional which you choose for your waste. Posh parts of town, I hear, have a green bin for compost.
Glass sorting is being done so well now that mixed colours are no longer a problem. There is even a new preference for leaving caps on glass bottles so the metal can contribute to the payback from the sorting equipment.
Plastic has had massive investment in displacing metal and glass packaging but keeps failing to put up the money needed to be as recyclable. Who can tell their PP from HDPE and all the colours (transparent and opaque) it can be made in? May as well just burn it and harvest the energy.