They bloody well do still use them; I find them on my doorstep regularly!
I've got on hanging around the fire smash glass activation thingie outside my door, and another around a handle on my chest of drawers (can't remember why!).
As far as I can tell they've just give back to using brown ones, which makes them a little less obviously related to the Royal Mail when you see them on the ground.
They bloody well do still use them; I find them on my doorstep regularly!
I've got on hanging around the fire smash glass activation thingie outside my door, and another around a handle on my chest of drawers (can't remember why!).