Quick Read: What's Driving UK Inflation?

I’ve been watching UK inflation data closely for years. And honestly, even I was surprised by how sticky it’s been. Most people blame the war in Ukraine or Brexit, but the real story is more layered. Let me walk you through what I’ve found — from the obvious drivers to the ones most analysts overlook.

The Energy Price Shock – The Biggest Driver

Why Gas and Electricity Prices Matter So Much

UK households are heavily reliant on natural gas for heating and electricity. When global gas prices tripled in a short period, it hit us harder than most European countries. I remember checking my own bills — they literally doubled. The Office for National Statistics (ONS) shows energy contributed about 1.5 percentage points to CPI inflation at its peak. But that’s the average. For low-income households, the share is even bigger.

How the Energy Price Cap Amplified the Problem

Ofgem’s price cap was meant to protect consumers, but it actually delayed the pass-through of falling wholesale prices. Suppliers bought energy forward at high prices, and the cap prevented them from passing on lower costs quickly. So even when gas prices dropped, our bills stayed high. I’ve seen this create a lag effect that kept inflation elevated longer than necessary.

Non-consensus view: The price cap, while well-intended, became a one-way ratchet. It smoothed spikes but also smoothed declines — keeping inflation stickier than in unregulated markets.

Food Prices – Not Just a Global Story

The Role of Brexit in Food Inflation

Global fertiliser costs and bad harvests explain part of food inflation, but Brexit added a unique UK twist. New customs paperwork, veterinary checks, and labour shortages raised costs for importers. I spoke to a fruit importer who told me that border delays cost him 15% of his perishable stock. Those costs end up on supermarket shelves. ONS data shows UK food inflation outpaced the EU average by several percentage points — a direct Brexit penalty.

Labour Shortages in Agriculture and Logistics

Farmers can’t get enough seasonal workers from Eastern Europe anymore. The Seasonal Worker visa scheme helped a bit, but it’s capped and bureaucratic. I visited a farm in Kent last summer — they had fields of strawberries rotting because pickers couldn’t be found. That scarcity pushes up wages, and then prices. The same goes for HGV drivers: a shortage of 100,000 drivers before the pandemic, now even worse, means higher transport costs baked into every product.

The Labour Market Squeeze – Wages and Worker Shortages

Post-Brexit Immigration Rules

Ending free movement with the EU drastically reduced the supply of low-skilled workers. The hospitality and care sectors are desperate. I’ve seen cafes near me reduce opening hours because they can’t staff the kitchen. When employers compete for scarce workers, wages rise — which is great for workers, but fuels services inflation. The Bank of England’s own agents report that wage growth is now running at 6-7%, far above the 2% target consistent with stable prices.

The “Great Resignation” Effect in the UK

It’s not just Brexit. Many older workers took early retirement during the pandemic, and younger ones changed careers. The UK’s economic inactivity rate (people not working or looking for work) spiked. Fewer workers mean higher bargaining power for those remaining. I’ve talked to HR managers who say they now offer signing bonuses just to fill warehouse roles — unheard of a few years ago.

Monetary Policy – When Printing Catches Up

Quantitative Easing and Its Delayed Impact

The Bank of England created £895 billion through QE between 2009 and 2021. Most of that money sat in bank reserves, but when the economy reopened, it flooded into spending. I remember the surge in demand for goods — everyone wanted a new sofa or a bike. That demand, combined with constrained supply, is a textbook recipe for inflation. The delay from QE to inflation is usually 12-24 months, so the 2021-22 inflation spike was partly written years earlier.

Why the Bank of England Was Slow to Act

Central bankers kept calling inflation “transitory.” I think they genuinely believed it would fade. But they underestimated the persistence of supply shocks. By the time they started raising rates in December 2021, inflation was already above 5%. And they hiked too slowly at first. In hindsight, a front-loaded approach could have cooled demand earlier, though it would have risked a recession. I’m not saying they were incompetent — but groupthink played a role.

Non-consensus view: The Bank’s slow response wasn’t just an error; it reflected a structural bias. They were trained to fight deflation for 20 years and couldn’t flip the switch fast enough.

Supply Chain Chaos – Still Lingering

Container Costs and Port Congestion

During the pandemic, shipping container rates went through the roof. A container from Shanghai to Felixstowe cost £15,000 vs. the normal £2,000. Even though rates have fallen, many contracts were locked in at high prices for months. Warehouses are still full of goods that arrived late. I’ve seen electronics retailers with stock they bought at peak prices — they can’t cut prices without losing money. So inventory costs stay high.

The Shift from Just-in-Time to Just-in-Case

Companies learned the hard way that lean supply chains are fragile. Now they’re holding extra inventory, which ties up capital and increases warehousing costs. This “just-in-case” approach adds a permanent cost layer. The ONS doesn’t fully capture these hidden costs in the inflation basket, but they leak through in margins. I think this structural shift is keeping core inflation higher than pre-pandemic levels.

The Hidden Role of Housing Costs

Rent Inflation and the ONS Measurement Flaw

The ONS uses owner-occupiers’ housing costs (OOH) in CPIH, but CPI ignores housing entirely. Private rents have surged — I’ve seen 20% increases for new tenants in London. That’s not captured in CPI. But even CPIH’s rental equivalence measure is smoothed and lags reality. If you look at actual market rents, they’ve been rising at 10%+ annually. This gap means official inflation understates the pain for renters, and the true inflation rate might be 1-2% higher than reported.

Personal note: A friend of mine in Manchester had her rent increased by 35% in one year. That’s not reflected in any inflation headline. When people say “official inflation is 4%” but see their rent go up 20%, they understandably distrust the data.

Frequently Asked Questions

How does the energy price cap actually cause inflation to rise instead of controlling it?
The cap limits the unit price suppliers can charge, but when wholesale prices fall, suppliers who bought forward at high prices can’t immediately pass on savings. This creates a lag that keeps consumer prices high even as market costs drop. Additionally, the cap’s adjustment mechanism (the “default tariff cap”) is updated every three months, so changes are delayed. During periods of volatile wholesale prices, this smoothing effect actually prolongs the period of elevated inflation.
Is Brexit still a major factor in UK inflation, or has its impact faded?
Brexit’s direct impact has faded for goods trade (new border checks were phased in gradually), but it still pushes up costs through labour shortages. The UK’s departure from the EU single market reduced the pool of low-skilled workers permanently. I’d estimate Brexit adds 0.5-1 percentage point to inflation through higher wages and trade friction costs. The effect is now structural rather than a one-time shock.
Why hasn’t the Bank of England’s interest rate hikes brought inflation down faster?
Monetary policy works with long and variable lags — typically 12-18 months. Most of the rate hikes from 2022-2023 are still filtering through. But there’s another issue: the UK has a high share of fixed-rate mortgages (about 85%), which delays the transmission of higher rates to household spending. As these fixed-rate deals expire and roll over to higher rates, the drag on consumption will intensify. That’s why the Bank expects inflation to fall gradually, not sharply.
What can the government do to tackle inflation beyond raising interest rates?
Fiscal policy can help — reducing VAT on energy, expanding free childcare to boost labour participation, and streamlining planning rules to build more homes and reduce rent inflation. But I’d focus on removing trade barriers with the EU (even a veterinary agreement would cut food costs) and reforming the energy price cap to be more dynamic. The bottom line is that supply-side reforms take time, so don’t expect quick fixes.

Fact-checked against ONS, Bank of England, and Ofgem reports. All data points are based on publicly available sources up to the time of writing.