Recycling in the UK

I'm woke & green. My side-hustle is scrapping stuff. For those whose wood-working skills may not their forte, I'm about to bin a pair of Wharfedale DX2 empty boxes. They are around 14/15 litres, sealed, and require 8 inch drivers. I offer these because there are two of them.
Anybody in the UK is welcome to have them for postage, otherwise the boxes are destined for landfill after the weekend.