Update 7 May 2021 the Court of Appeal ( EWCA Civ 584) has, justifiably in my view, overturned. Note ia the discussion of language and the meaning of ‘discard.
In  UKUT 0001 (TCC) Devon Waste Management, Biffa and Veolia v Inland Revenue, the tax and chancery chamber of the Upper Tribunal discussed the classification of ‘fluff’ as waste. The fluff at issue is not the type one may find in one’s pockets (or, dare I say, belly button). Rather, the “black bag” waste material that is disposed of at landfill sites and used by operators as a geomembrane liner and geotextile protection layer.
As Constantine Christofi at RPC reports, (see also UKUT at 22) the first tier tribunal – FTT had earlier found that that the use made of the material disposed of was only an indicator of whether there was an intention to discard the material, and that use was not conclusive in determining whether it was discarded. In the view of the FTT, the use of such material as a protective layer was not sufficient to negate an intention to discard it as it was destined for landfill in any event and because there was no physical difference between that material and the other general waste disposed of at the landfill sites. The FTT therefore held that the disposal of the waste was a taxable disposal by way of landfill: not everything that could be characterised as “use” was sufficient to negate an intention to discard.
The FTT had (UKUT does not at all) considered EU law precedent. UKUT relied on English authority and overturned the FTT’s finding on the basis of the FTT having fallen into the “once waste, always waste” trap (at 74). In deciding like this, UKUT itself in my view may have fallen into the alternative ‘once someone’s waste not that of another’ trap. At 52: ‘An owner of material does not discard it, within the meaning of the statutory provisions, if he keeps and uses it for his own purposes’. Making use of materials for the site operator’s purposes connected with regulatory compliance, when they are deposited in the cell, is use that is necessarily inconsistent with an intention to discard the materials.
This arguably is the kind of single criterion test which when it comes to (EU and UK) waste law has been rejected.