Alupro's review of 156 monthly observations spanning January 2013 to December 2025 has found that higher packaging waste recycling note (PRN) prices are associated with a greater share of material being exported rather than reprocessed in the UK — evidence that lands just as Defra intervenes in the PRN market over feared evidence shortages for the 2026 compliance year.

The aluminium body's analysis covers seven material types over 13 years and holds significant implications for how producers and reprocessors should read the current market disruption. It does not assess the 2026 regulatory changes or Defra's recent intervention.

What does the data actually show?

For six of the seven materials studied, higher PRN prices were significantly associated with higher long-term recorded recycling tonnages. Plastic showed the greatest price sensitivity of any material in the dataset.

But the export picture is where it gets uncomfortable for domestic reprocessing. Higher prices were associated with an increased export share for four streams:

• Aluminium
• Glass re-melt
• Paper and board
• Plastic

Aluminium stands out as the only material where higher prices lined up with both falling domestic reprocessing tonnages and rising exports.

Alupro suggests exports may act as a "release valve" when recycling targets come under pressure and domestic facilities cannot respond quickly. The body is careful about causation, though: the statistical associations do not establish that price increases drove the changes, nor that domestic capacity constraints explain the export shift.

The aluminium anomaly

For aluminium, the relationship between price and tonnage depended on direction. Price increases showed a significant association with higher overall tonnages, while price decreases showed no statistically significant association at all. Alupro reads this as evidence that gains in tonnage may persist even after prices fall — a point worth noting for anyone modelling compliance costs over a full cycle.

The review also tested whether prices respond to evidence availability. For six of the seven materials, they do: surpluses correlate with lower prices, shortfalls with higher prices. Some volatility remained unexplained even after accounting for economic activity, energy costs, recycling targets and seasonality.

Why this matters right now

The timing is the story. Defra has announced an intervention in PRN markets over concerns about potential shortages of recycling evidence that could leave producers unable to meet their full 2026 obligations.

In England, the Environment Agency's regulatory position statement says it will not normally take enforcement action where producers and compliance schemes meet specified conditions — securing at least 83% of their statutory obligation for plastic, 92% for steel and 90% for wood.

The concessions apply to the 2026 compliance year only, and the statement leaves legal recycling obligations unchanged. Full obligations continue to apply to other materials, including aluminium — the very stream where Alupro's data shows the weakest domestic response to price signals.

Stephen Devine, Alupro's membership and business development manager, said the organisation set out to examine the relationship between prices and recycling tonnages.

"Rather than supporting or dismissing PRNs, we've simply collated a factual base of evidence to better understand the scheme's performance over the past decade," he said.

Alupro says it hopes the research will serve as an evidence base for consultations on future reform of the PRN system.

For compliance schemes and reprocessors, the practical question is whether the 2026 enforcement floor — set below statutory targets for three materials — becomes a bargaining reference in PRN trading. The consultations on PRN reform, and Defra's handling of the 2026 evidence shortage, will decide whether the export "release valve" Alupro identifies gets sealed or simply repriced.