For our ocean’s sake, we can’t keep kicking the can – or bottle – down the road. We call on the UK government to speed up this law and to follow Wales’s ambition to include plastic, metal and glass.”
The "ocean's sake"?
Glass doesn't float. If it winds up in the ocean, one just gets beach glass.
In fact, we had a place up in California where a beach was being directly used as a dump once. The only remaining stuff, after the metal had rusted away and such, was glass, and it all got turned into beach glass. The state went from trying to stop people from dumping things on the beach to banning people hauling away the beach glass; it had become a tourist attraction.
https://en.wikipedia.org/wiki/Glass_Beach_%28Fort_Bragg%2C_California%29
Glass bottle recycling is about reuse. Wash the bottle and use it again.
In the UK off-licenses (liquor stores) used to partake in a scheme where they'd take your empties and give you money off your next purchase. Those bottles were then sent back to the bottling plant to be reused. It went away with the wide spread use of plastic bottles (80s).
Aas far as I'm aware, there's no reason not to do it again except the distribution network is more centralised now, and sending stuff back is something nobody budgets for. I expect this is the "too complicated aspect".
Have Neoliberals done anything that isn't a huge disappointment?
