I didn’t say the council dug it up but it’s under the remit of Amey but it’s quite obvious they do not monitor their contractors. As for replacements, there’s always , always more ordered than needed so you can see them in depots around the city or as seen they use any overstock by dumping them in other large fills, before any says how do you know my brother saw it on happen many times.
The photo shows a garden constructed with unwanted stones, block paving etc that Amey were intent on just throwing away.