UK Carbon's Discount to EU Permits Persists as Linking Talks Go Nowhere
The UKA-EUA spread that widened sharply in Q1 2026 has not closed, leaving UK allowances roughly €13 below EU equivalents while geopolitical volatility reshapes both markets.
As of Monday (2026-08-31) morning, the UKA Dec-rolling contract was priced at £58.84 per tonne of CO2 and the EUA Dec contract at €82.21 per tonne. At sterling's current rate of 1.17 against the euro, UK carbon is worth roughly €69 per tonne in comparable terms, more than €13 below its EU equivalent. Argus Media reported on April 2 (2026-04-02) that the UK ETS front-year contract had significantly widened its discount to the EU throughout Q1 2026. Five months on, the spread has not meaningfully closed.8
The Argus analysis traced the widening to a collapse in optimism about linking the two systems. Signs of progress in connecting the UK and EU trading schemes were scant in Q1, eroding expectations that had previously kept UK prices closer to EU benchmarks. Without a credible path to convergence, UKAs trade as a structurally separate and cheaper instrument.8
Geopolitical shocks have driven much of the intra-year volatility in EU carbon while doing little to compress that gap. Montel reported that the Dec 26 EUA contract fell to a two-week low on Monday, June 8 (2026-06-08), pulled lower by rising Middle East tensions and a full primary auction schedule for the week.5
Iran has been the recurring variable all year. Carbon Pulse's midday update on Wednesday (2026-05-20) showed EU carbon prices recovering from an early-session decline triggered by the United States' rejection of an Iranian peace proposal over the previous weekend, with UKAs jumping to a three-month high as positive fundamental sentiment built through the afternoon. But both markets moved in the same direction. They did not narrow the spread between them.3
The Iran-to-carbon transmission runs through European gas and the coal-gas switching margin. When Middle East tensions push gas prices higher, coal-fired generation becomes more competitive and power producers buy more EUAs. The EEX told Montel that "extraordinary" spikes in trading volumes surrounded the Iran conflict escalation, including a 62% increase in gas derivatives activity. A total of 1,721 TWh of European gas derivatives changed hands in Q1 2026, spot gas trade rose 9% to 972 TWh over the same period, and power derivatives volumes climbed 29% to 3,238 TWh.1
That pressure has since partially eased. Dutch front-month gas fell 3% on Wednesday (2026-08-19), British wholesale contracts moving by a comparable margin, as signs of diplomatic progress between Washington and Tehran removed some of the supply overhang, Reuters reported. Brent crude fell more than 2.5% toward $86 a barrel across two consecutive sessions in that period.7
Gas storage shortfalls continue to provide a floor for the broader gas-carbon complex. Gas Infrastructure Europe data show European facilities at approximately 62% of capacity against a five-year seasonal average of around 79% as of mid-August (2026-08-19).7 Back in late May, caverns were hovering just above 35% full against a typical 50% seasonal norm, oilprice.com reported on May 25 (2026-05-25), a shortfall that drove much of the earlier gas-price spike.4 The current deficit, while narrower, still implies sustained gas demand into the autumn injection season.
EU carbon analysts also cut their price forecasts in late April (2026-04-30), Reuters reported, citing uncertainty over proposed policy reforms and future supply levels in the EU ETS.6
ICE Endex TTF front-month gas held at €66.79 per MWh on Monday (2026-08-31) morning, flat on the day, while EUAs stayed at €82.21. Argus data show European jet fuel spot premiums have slipped to their lowest since the start of the US-Iran conflict, at $99 per metric tonne over ICE gasoil futures — suggesting geopolitical overhang in products markets has unwound further than in carbon. UKAs, at roughly €13 below EUAs, still reflect a market pricing for continued separation. The next concrete signal is any formal statement from UK or EU officials on the status of linking negotiations.2