This is quote from that .gov document:
"The Government has also pledged to continue to work closely with the professional horticulture sector on speeding up their transition to peat-free alternatives ahead of a ban for the professional horticulture sector, recognising that the professional horticulture sector faces additional technical barriers that will take longer to overcome."
So, corporate interests take precedence over the poor amateur consumer again. You'd think the professional horticulture sector would have much greater clout when it comes to finding a replacement and getting a good price for it. As most of us know there are alternatives eg coir, Melcourt bark, but at a price for us unless it starts being sold in garden centres.