Glass has been considered for top box, key thing is keeping it apart from paper and cardboard. Main disadvantage is it's more dangerous than cardboard if bin falls over.
Sorry am I understanding you correctly?
The council had a tender for the supply and emptying of a large recycling bin.
The tender was for a large bin for cardboard with a smaller insert for bottles cans etc
At some point during the process the decision was taken by somebody that it was safer for the glass etc to be in the main part of the bin and the cardboard in the insert.
This was how the contract was let.
Am I right?
And if I am who was the 'somebody'?