I’m comparing UK and Spanish supermarkets here and adding a bit of an insight on how shopping differs between the two countries. I’ll also mention the rise of the British discounters back in the UK, while wondering if these stores will ever arrive in Spain.
Table of Contents
The weekly supermarket shop is a universal ritual, yet the experience varies dramatically across national borders. For a British tourist wandering through the cavernous aisles of a Spanish Carrefour, the reaction is often one of awe: “Spanish supermarkets are a different level,” marvelled one UK visitor, stunned by the “freshness” and “massive” size of the stores. He described his find as “yet another ‘win’ for Spain,” highlighting just how different the grocery landscape can be. However, a closer comparison reveals a more complex picture.
While Spain offers a traditional bounty of fresh produce and a clear market leader in Mercadona, the United Kingdom has become a battleground for a distinctly different phenomenon: the rapid, disruptive rise of the hard discounter and a ferocious price war that has reshaped the entire sector in a way Spain is only just beginning to experience.
One newish comer in Spain is Amazon’s food and drinks offering. I know some of you hate these huge global businesses ( while watching Sky TV, I might add ), however.
Consum this week has the Fanta on offer
Refresco Limón Zero Lata 0,33 L
2,09 €/1 L
Promoción Ahora más barato que aplica desde 23/07/2026 hasta 26/08/2026
Ahora más barato
0,80 € = usual price
0,69 € = on offer
Amazon: we got a tray of 24 of the same 33ml cans for 12,80€, delivered to the door.
The Spanish Model: Mercadona’s Kingdom and Regional Champions
Spain’s supermarket sector is characterised by a clear, dominant hierarchy. Mercadona is the undisputed titan, holding a commanding 27.2% market share, a figure that dwarfs its competitors . This dominance is built on a model of high penetration—reaching 93.2% of Spanish households—and strong customer loyalty . The rest of the market is fragmented, with Carrefour (9%) and Lidl (7.3%) trailing far behind, alongside strong regional players like Consum and Eroski .
The Spanish shopping experience, as noted by the British tourist, is often defined by its fresh offerings. The sheer “variety and quality” of the fresh fruit, vegetables, and meat is a point of pride, offering consumers a tangible connection to local produce that can seem lacking in other markets . This focus on fresh, high-quality products at competitive prices is a core tenet of the Spanish retail identity, often making it feel like “another world” to visitors from the UK .
The UK’s Discounter Revolution: An Aggressive Price War
In stark contrast, the UK’s grocery sector is in the throes of a discounter-driven revolution that has fundamentally altered the competitive landscape. The “big four” supermarkets—Tesco, Sainsbury’s, Asda, and Morrisons—have been forced onto the defensive by the relentless expansion of German discounters Aldi and Lidl . These chains have transitioned from being perceived as niche, budget options to becoming mainstream favourites, winning over middle-class shoppers with bargain champagne and high-quality baked goods . This is a level of market disruption and consumer acceptance that Spain’s discounters, while growing, have yet to fully achieve.
The Battle for Market Share
The figures are stark. In the UK, Aldi and Lidl now command a combined market share approaching 20%. Lidl recently overtook Morrisons to become the UK’s fifth-largest supermarket, while Aldi sits in fourth place, just 0.6% behind Asda . This rapid ascent is fuelled by massive investment; Aldi has committed £1.6bn to expansion, aiming for 1,500 stores, while Lidl is spending over £600m to open more than 50 new stores . This aggressive expansion forces traditional giants like Tesco to respond with “Aldi Price Match” campaigns, illustrating the disruptive power these discounters now wield .
Intense Price Competition: A UK Specialty
Perhaps the most defining feature of the UK discounter model is the intensity of its price competition. A monthly analysis by consumer group Which? shows Aldi consistently as the UK’s cheapest supermarket, with a basket of 95 items costing just £163.34 in June 2026. Lidl is a close second, just £1.58 more expensive . This razor-thin margin creates an unparalleled price war that forces all players to compete aggressively on cost. The UK market has also seen the rise of a “loyalty price war” where supermarkets like Sainsbury’s and Tesco offer significant discounts only to members of their loyalty schemes, creating a two-tier pricing system that effectively penalises non-members .
A Tale of Two Discount Models: The Olive Oil Paradox
A fascinating direct comparison emerges from a TikTok experiment where a shopper bought a similar basket of goods at Lidl in both the UK and Spain. The total in the UK came to €50.33, while the same items in Spain cost €57.25, meaning the UK shop was cheaper by almost €7 . This data point completely upends the common assumption that Spain is always the cheaper option.
The most dramatic example was the price of olive oil. In the Spanish Lidl, it cost €8.90, prompting the shopper’s exclamation: “It seems so strong to me!” . In the UK Lidl, it was just €5.28 . This stark difference arises because olive oil is a staple in Spain (consumption of 11 litres per person annually) but is a niche product in the UK (under 1 litre per capita). The UK’s oil is often from older, cheaper stock bought in bulk, and the market reduces profit margins to attract customers who might otherwise buy cheaper sunflower or rapeseed oil .
Why the UK Model is Uniquely Aggressive
Several factors make the UK’s discounter phenomenon uniquely aggressive. The Competition and Markets Authority (CMA) is currently looking to close a land-use loophole that allowed Aldi and Lidl to block competitors from opening stores nearby, a privilege not afforded to the “big four”.
However, analysts believe that even if this rule changes, the discounters’ momentum is unlikely to be halted . Their lead in cost-efficiency, supply chain optimisation, and modern, appealing store formats gives them a lasting edge. As one analyst put it, “It’s not like the Premier League”—their position is built on a structural advantage that can’t be easily overturned .
We do order from Amazon for the harder to find bits and pieces for the home or gargage etc, and at the same time we’ll check to see what else they have on offer or at better prices in their food and grocers section.
The challenge for Spanish supermarkets is that while the discounters are gaining ground, they are doing so against a far more entrenched and dominant competitor in Mercadona. The UK experience shows that once discounters reach a critical mass and win over the mainstream middle class, they can fundamentally redraw the competitive map. The Spanish market may be next in line for this discounter revolution, but for now, it remains a story of a powerful national champion versus a sprawling, price-driven war in the UK where the very definition of a “cheap shop” is being rewritten on a weekly basis.
We do find though fresh fruit and veg from the local markets is cheaper and fresher.
Just a heads‑up: if you buy anything through the links on this page, I might earn a tiny commission. Nothing dramatic — it basically goes straight into my G&T fund. Don’t worry, I won’t waste a single euro; it’ll be responsibly invested in ice, tonic, and a slice of limón.
