UK Jet Fuel & Road Fuel — 2026 Three-Scenario Forecast

Reading the chart. The solid blue line is the observed UK aggregate jet-fuel days-of-cover from March 1 — when the Strait of Hormuz closure first began propagating through European refining margins — through today. Cover has drifted from roughly 32 days at the start of March to about 24 days by June 3, hovering just above the IEA's 23-day operational threshold (the red horizontal line). The three dashed paths bracket what happens between now and year-end: green if the workarounds that have held so far continue holding (Scenario 1), amber if Goldman Sachs's May 6 projection of a UK threshold breach materializes during the August demand peak (Scenario 2), or red if the underlying Hormuz crisis extends and aviation stress spreads to retail road fuel (Scenario 3). The "today" line marks where the modelled paths begin diverging from the observed line.

Scenario 1Network holds — workarounds absorb the August demand peak. The DfT's analysis of OAG schedules confirmed only about 1,200 UK departures cancelled May 3 to June 14 — less than 1% of planned flights and a small fraction of the more alarmist Cirium-driven coverage. Major carriers (Lufthansa, KLM, Ryanair, British Airways) have separately told markets they expect stable summer supply via North American and African imports plus hedging; Lufthansa's 20,000 cancellations through October are already announced and absorb the demand bulge they were intended to. Easyjet reported 70% summer-2026 hedged at Wego May 5. On this path UK aggregate jet-fuel cover dips into the low 20s through July and early August — touching but not breaching the 23-day threshold — then begins recovering as carrier capacity stays pre-cut and import flows from non-Gulf sources continue. By December, cover returns to about 28 days (still below the 5-year norm of 35 days). Summer cancellations sit at 1.5–2%, broadly in line with the current trajectory. This is the path the operational data currently supports.

Scenario 2Threshold breach — Goldman's May 6 projection materializes. Goldman Sachs identified the UK as the European market most exposed to a June breach of the IEA 23-day threshold, primarily because UK aviation depends heavily on imported refined product (Britain refines a smaller share of its own jet fuel than France or Germany). On this path, the August demand peak — IEA's Birol has noted August jet-fuel demand runs roughly 40% above March — overwhelms the workaround supply chain. Aggregate cover dips below 23 days from mid-June, troughs at about 15 days at the end of August (still well above the 8–10 day hub-level worst-case ACI Europe warned about in April), and recovers only partially to 22 days by December. NOTAMs are issued at one or two secondary airports during the trough; the DfT's slot-rule consultation is invoked in earnest; cancellations climb to 4–7% of scheduled departures. Road fuel availability is largely unaffected — this is a jet-specific scenario.

Scenario 3Broader retail crack — aviation stress spreads to road fuel. Iran follows through on the June 1 threat to extend closure to Bab el-Mandeb, removing the Red Sea workaround that has been quietly underwriting European refining throughput; Russia pre-empts the EU's June 17 ban by redirecting volumes to Asia. UK jet-fuel cover degrades faster than in Scenario 2 — troughs at about 8 days at the end of September, which is the hub-level reality ACI Europe described in its April 9 letter to the EU Transport Commissioner ("many hubs at 8–10 days stock"). Cancellations climb to 10–15% of scheduled departures; multiple airports issue NOTAMs; the slot-rule consultation tightens into a coordinated cull. Crucially, the same conditions that crack aviation also reach retail: with refining throughput cut and Russian product withdrawn, UK petrol and diesel availability slips to about 78% of normal by Q4, and the first reports of intermittent station outages begin appearing (UK government activates fuel-priority guidance similar to the September 2021 contingency framework). By December, jet cover recovers only to about 14 days — still in physical-shortage territory.

UK factorWhy the UK is different from the EU forecast. The EU forecast on this site (modelled June 2, 2026) tracks aggregate petrol and diesel availability as a percentage of normal supply — appropriate because the EU's stress is currently broad and road-fuel-led (Slovenia rationing, Hungary price cap, PCK Schwedt feedstock cut). The UK's stress is narrower and aviation-led. UK retail road fuel has held throughout the crisis — Transport Secretary Heidi Alexander has said publicly there are "no immediate supply issues" — but the UK aviation system is the European market analysts have flagged as most likely to break first. The chart shape and the scenarios are therefore different: the IEA's 23-day jet-fuel threshold is the central reference, the bracketing question is whether it breaches this summer, and the road-fuel dimension only becomes relevant in the worst scenario. UK Day +N — the count of days past Ryanair CEO Michael O'Leary's May 4 cliff edge — is the operational counter on the parent page; as of today (Jun 3, 2026) it stands at Day +30. The longer Day +N grows without operational breach, the more credibility Scenario 1 accumulates.

MethodThis is a scenario forecast, not a prediction. The observed Mar–Jun line is built from IATA Jet Fuel Monitor weekly prints, ACI Europe stock estimates, DfT operational reporting of schedule cancellations, and Cirium airport-level cancellation data. The Jun–Dec branches are illustrative model paths, not guarantees; the real outcome will depend on the pace of any US-Iran diplomatic settlement, whether Iran follows through on its Bab el-Mandeb extension threat, whether Russia pre-empts the EU's June 17 short-term pipeline gas ban, August weather (a hot August lifts jet demand further), and refinery uptime in the North Atlantic basin. Built around the Goldman Sachs May 6 jet-fuel inventory projection identifying the UK as the European market most at risk of a June threshold breach, with the operational data through June 3 layered on top. Sources: IEA Oil Market Report (May 2026), IATA Jet Fuel Monitor (weekly, latest Jun 1 at $141.64/bbl global average), ACI Europe letter to EU Transport Commissioner Apr 9, Goldman Sachs May 6 note, UK Department for Transport schedule analysis, Cirium UK cancellations dataset, Transport & Tour World May 12, NewsHub UK aviation coverage, UK government slot-rule consultation May 2. Per-pin detail and the live UK aviation watchlist at global-energy-flow.com/shortages/united-kingdom/.