Fill-up Fury: Why £100 for a Family Car Might Be Back on the Cards This Summer

Just as millions of families load up the boot, check the tyre pressures and set off for the coast or the Continent, the fuel gauge is delivering some unwelcome news. According to the RAC, forecourt prices have been climbing again, and the cost of a full tank for a typical family car is edging back towards that psychologically brutal £100 mark. For anyone who remembers the pain of 2022's fuel crisis, this will feel like an unwanted rerun, and the timing, right at the start of the school holidays, could hardly be worse.

What's actually happening at the pumps

The latest increases are being driven by rising wholesale costs, with the RAC pointing to the conflict involving Iran as a key factor pushing up the price of crude oil and refined fuel on international markets. Petrol and diesel prices have risen in tandem, and while a small increase per litre might not sound dramatic, it adds up quickly once you're filling a 55 or 60-litre tank.

This isn't an isolated blip. UK fuel prices have been on a rollercoaster for the past few years, reacting to everything from the war in Ukraine to OPEC production decisions and, now, instability in the Middle East. Iran's role as a major oil producer, and its proximity to critical shipping routes such as the Strait of Hormuz, means any hint of conflict tends to spook energy markets almost immediately. Traders price in the risk of supply disruption long before any actual shortage materialises, and that risk premium gets passed straight down to the person standing at pump six with a card in hand.

Why this matters beyond the forecourt

It's tempting to see fuel prices as simply an annoying but temporary irritation. In reality, they ripple through the entire cost of motoring and, by extension, the cost of living.

Family budgets take a direct hit. Summer is peak travel season. Whether it's a motorway dash to Cornwall, a cross-country trip to see relatives, or the first leg of a European road trip via the Channel Tunnel or a ferry crossing, higher fuel costs eat directly into holiday budgets. For many households already squeezed by mortgage rates, energy bills and food inflation, an extra £10 or £15 per fill-up is real money.

Haulage and logistics costs rise too. Higher diesel prices don't just affect private drivers. Delivery firms, coach operators and hauliers all pass on increased fuel costs eventually, which can feed into the price of goods on supermarket shelves months down the line. Fuel price spikes rarely stay contained to the person at the pump.

It reshapes travel decisions. Some drivers respond to higher prices by shortening journeys, switching to public transport where practical, or reconsidering whether that summer road trip is worth it at all. Others, inevitably, start looking harder at electric vehicles, and it's no coincidence that previous fuel price surges have coincided with spikes in enquiries about EVs and hybrids.

The legal and regulatory angle

Fuel pricing in the UK isn't entirely a free-for-all, even though it can feel that way when prices jump overnight. There are a few regulatory mechanisms worth understanding.

Fuel duty is a fixed tax charged per litre, currently frozen, which the Treasury has extended in recent budgets rather than allowing it to rise with inflation. This freeze has kept a lid on some of the pain, but it also means that when wholesale prices rise, drivers feel the full force of it rather than having some of the increase absorbed by falling duty.

The Competition and Markets Authority (CMA) has an ongoing role in monitoring the road fuel market. Following previous concerns that retailers were slow to pass on wholesale price drops but quick to pass on rises, the CMA has pushed for greater transparency. This included recommendations that eventually led to a fuel price finder scheme, intended to let drivers and comparison apps see live prices at stations across the country. It's worth knowing that if you suspect a fuel retailer near you is behaving anti-competitively, or that prices are rising faster locally than the wholesale market justifies, you can raise concerns with the CMA.

Trading Standards also has a role where retailers might be engaging in misleading pricing practices, though most fuel price fluctuations are simply down to legitimate market forces rather than anything unlawful.

None of this means drivers have a legal right to cheaper fuel, of course. Fuel retailing is a commercial market, and prices are set by individual businesses responding to their own costs. But understanding the regulatory backdrop helps explain why price rises can feel so sudden and, at times, so uneven from one station to the next.

What drivers should know and do

While nobody can control the wholesale oil price, there are sensible, practical steps drivers can take to soften the blow this summer.

• Compare prices before you fill up. Price differences between stations, even in the same town, can be significant. Supermarket forecourts are often, though not always, cheaper than motorway services, and using a fuel price comparison app before setting off can save a genuinely useful amount over a long trip.
• Avoid motorway services for a full fill-up where possible. Prices at service stations are almost always higher than those just a few miles off the motorway. If you can, fill up before joining the motorway or plan a short detour.
• Drive efficiently. Smooth acceleration, maintaining steady speeds, keeping tyres correctly inflated and removing unnecessary weight from the boot or roof box can all improve fuel economy. On a long summer journey, these small changes add up.
• Plan your route with fuel stops in mind. Rather than filling up wherever you happen to be running low, a bit of route planning can let you choose cheaper stations along the way, particularly useful for those heading towards ports such as Dover for a European getaway.
• Keep an eye on RAC and AA price updates. Both organisations track average national prices and regional variations, which can help you judge whether a price you're being quoted locally is reasonable or on the high side.
• Consider your journey timing. If flexibility allows, avoiding the most congested getaway days can reduce time spent idling in traffic, which burns fuel without covering any distance.

Looking ahead

The uncomfortable truth is that fuel prices remain hostage to global events largely outside the UK's control. As long as tensions persist in the Middle East, or shipping routes face disruption risk, wholesale costs are likely to stay volatile, and forecourt prices will follow. The RAC's warning about a £100 fill-up isn't scaremongering, it's a reflection of how quickly small percentage rises in wholesale costs translate into noticeable increases for ordinary drivers.

For the government, there will be renewed pressure to consider whether fuel duty policy needs revisiting, particularly if prices climb further and squeeze household budgets during what's meant to be the most affordable time of year for family trips. For drivers, the immediate reality is more mundane but no less important, budgeting a bit more carefully for the summer getaway, shopping around for the best pump prices, and accepting that the days of cheap, predictable fuel costs may not return any time soon.

Whether this proves to be a temporary spike or the start of a more sustained rise will depend heavily on how the situation in Iran develops, and how quickly, if at all, wholesale prices ease back. Until then, it's worth keeping a close eye on prices before you set off, because the difference between stations really can determine whether that fill-up costs £85 or edges uncomfortably close to three figures.