UK Aviation Fuel
Jet is the acute summer-travel risk; diesel is the chronic structural buffer problem. This page tracks both side-by-side, because the most informative number is not the jet days-of-cover in isolation — it's the gap between jet and diesel, and how that gap has widened. The UK story is more about diesel hollowing out underneath aviation than about jet collapsing on its own.
UK Aviation Fuel — Jet vs Road Fuel Divergence
DESNZ period 2026-02 · updated 14 May 2026UK jet fuel
33.3days
Status: critical · 90-day benchmark
UK diesel (comparator)
20.4days
Status: critical · the structural deficit
Jet–diesel gap
+12.9days
Widened from +6.3 two years ago
The UK story isn't jet running out — it's diesel quietly hollowing out underneath it. Jet fuel cover has held in a 22–35 day band for two years; diesel cover has eroded from 25 days to barely above 20. The acute summer-travel risk on jet is real, but the structural buffer problem is in diesel — and the gap between the two has widened by roughly 7 days since January 2024.
UK jet vs diesel days of cover — last 26 months (DESNZ monthly stocks)
Why the UK is uniquely exposed
No strategic jet reserve. The UK sits outside the EU's 90-day stockholding framework (Directive 2009/119/EC) post-Brexit and holds no dedicated strategic reserve specifically for jet fuel. The 33-day figure above is commercial inventory.
Heathrow concentration risk. A single airport — Heathrow — handles roughly 60% of UK jet fuel demand. That makes the national exposure look more like a single-point-of-failure than a diversified system. Schiphol, CDG and Frankfurt are each a smaller share of their national demand.
NW European refining dependence. Around 40% of UK middle-distillate imports (diesel and jet) come from refineries in the Netherlands and Belgium — Pernis, Rotterdam, Antwerp. Any disruption to that NW European refining cluster shows up in the UK supply system within days. See the Refinery Health panel on /supply for the live picture.
Refining-yield mismatch. European refineries are configured for Middle Eastern medium/sour crudes that yield roughly 13–15% jet. When operators run alternative crudes — US light tight oil, Brazilian, West African — jet yields fall toward 9–11%. Even a fully-supplied crude market can leave the European jet barrel short, which is exactly what Atlantic arbitrage looks like in 2026. UK supply rides on whatever NW Europe yields after running whichever feedstock is economic that month.
For the EU-wide view — 27 countries, ARA hub commercial stocks, country-by-country days-of-cover — see the EuroOilWatch Jet Fuel Tracker ↗
UK stocks via DESNZ Energy Trends Table 3.11 — monthly, ~2–3 month publication lag. Heathrow demand share is a long-running industry-standard figure; the 13–15% / 9–11% jet-yield ranges are approximate values reflecting refinery configuration differences and should be read as directional.
Related reading
UK Diesel Reserves: What 23 Days Actually Means — the structural-deficit piece behind the diesel line on the chart above.
The Anatomy of a System Shock — what a prolonged Hormuz closure means for UK fuel security across diesel, jet, fertiliser, and food.
Britain Is Paying Europe's Highest Price for Trump's Iran Blockade — the geopolitical context. The aviation exposure sits inside the broader Hormuz story.
EuroOilWatch Jet Fuel Tracker ↗ — 27-country EU breakdown plus ARA hub commercial stocks. Use this to see how the UK compares to peers.