Britain’s competition regulator has moved to close a long-standing loophole that let Aldi and Lidl use property deals to keep rival supermarkets out of prime locations. In a provisional decision published on August 7, the Competition and Markets Authority (CMA) said the two discounters should be reclassified as Large Grocery Retailers and required to follow the same land agreement rules that already bind Tesco, Sainsbury’s, Asda and four other chains.
The proposal, which is open to consultation before it becomes final, targets restrictive covenants and exclusivity clauses. These are contract terms that can prevent a competitor from opening a store on nearby land for years. For a global grocery sector that has watched the two German-owned discounters expand aggressively, the case signals that regulators now view Aldi and Lidl not as scrappy challengers but as market heavyweights that deserve the same scrutiny as long-established incumbents.
In short
- What happened: The CMA provisionally ruled that Aldi and Lidl should be designated Large Grocery Retailers and brought under the Groceries Market Investigation (Controlled Land) Order 2010.
- The target: Restrictive covenants and exclusivity land agreements that block rival grocers from opening nearby stores.
- Who is already covered: Asda, Co-op, Marks and Spencer, Morrisons, Sainsbury’s, Tesco and Waitrose.
- Why now: Aldi and Lidl rank as the UK’s fourth and fifth largest grocers, in a food and grocery market the CMA values at roughly £215 billion.
- Next step: The consultation runs until September 7, with a final decision expected in the autumn.
What the CMA decided
The regulator said Aldi Stores Ltd, Lidl GB and Lidl Northern Ireland meet the criteria to be treated as Large Grocery Retailers, a status that carries specific obligations around property. Designation would place them under the Controlled Land Order 2010, which restricts how grocers can write and enforce land deals.
The CMA set out three tests it says the discounters now satisfy: individual stores with a sales area above 1,000 square meters, a full grocery product range, and direct procurement from suppliers through integrated wholesaling. Juliette Enser, a CMA executive director, framed the move as a fairness measure, saying the proposals were about giving shoppers greater choice and creating a level playing field for all major supermarkets, according to the regulator.
How land covenants keep rivals out
Restrictive covenants are clauses attached to a plot of land or a lease that limit how it can be used, sometimes long after a retailer has moved on. A grocer can, for example, sell or vacate a site while inserting a covenant that bars the next owner from operating a competing supermarket there. Exclusivity agreements work similarly by locking a landlord into leasing only to one retailer within a shopping area.
The concern for regulators is that these tools can freeze local competition. When a dominant grocer controls the usable retail land in a town, shoppers may be left with fewer stores, weaker price competition and less choice. The 2010 Order was designed to stop the largest chains from using land in this way, and the CMA now argues the same logic applies to Aldi and Lidl.
Why the discounters slipped through until now
The Controlled Land Order dates back to a sweeping market investigation into UK groceries that concluded in the late 2000s. At that time, Aldi and Lidl were minor players with a small national footprint, so they fell outside the definition of a large retailer and were never bound by the rules.
That picture has changed dramatically. Both chains have opened stores at a rapid clip over the past decade, winning shoppers with a tighter product range and lower prices. The CMA now counts them among the country’s top five grocers, and it says their scale and buying power mean the original exemption no longer makes sense.
The road ahead
The decision is provisional, not final. The CMA has invited retailers, suppliers and the public to respond before it settles the matter later in the year. The key dates are set out below.
| Date | Milestone |
|---|---|
| 2010 | Controlled Land Order takes effect for the UK’s largest grocers |
| August 7, 2026 | CMA publishes its provisional decision to designate Aldi and Lidl |
| September 7, 2026 | Deadline (5pm) for responses to the consultation |
| Autumn 2026 | CMA expected to issue its final decision |
If the designation is confirmed, Aldi and Lidl would need to review existing land agreements and unwind terms that breach the Order. The regulator has indicated the final ruling could arrive as soon as October, though it has framed the timeline as autumn rather than committing to a specific date.
What it means for shoppers and global grocers
For UK shoppers, the immediate effect is limited, since the proposal governs how stores get built rather than what happens at the checkout. Over time, though, the CMA’s aim is more competition in local markets, which can translate into more store choices and sharper pricing.
The wider signal reaches beyond Britain. Aldi and Lidl are expanding across Europe, Australia and the United States, where Aldi has been one of the fastest-growing grocery chains and continues to open stores across the South and East. Regulators in other markets watch UK competition cases closely, and a decision that treats the discounters as incumbents rather than insurgents could inform how their real estate strategies are judged elsewhere. The read-across is not automatic, and each market sets its own rules, but the reclassification underlines how far the two chains have traveled from challenger status.
How Aldi and Lidl responded
Both retailers played down the impact. Aldi said it remained committed to opening hundreds more stores across the UK, while Lidl said any final decision would not affect its growth momentum, according to statements reported after the announcement. Neither company conceded that the rules would slow its expansion, and both have staked their strategies on continued store openings rather than on blocking rivals.
That confidence is notable. If the discounters genuinely rely on covenants to protect their sites, tighter rules could complicate future deals. If, as they insist, their growth rests on price and convenience, the change may prove more symbolic than disruptive.
Frequently asked questions
What is a restrictive covenant in retail property?
It is a legal condition attached to land or a lease that limits how the site can be used. In grocery retail, a covenant can prevent a plot from being used as a competing supermarket, sometimes for many years, even after the original retailer has left.
Which supermarkets already follow these land rules?
The Controlled Land Order 2010 currently applies to Asda, Co-op, Marks and Spencer, Morrisons, Sainsbury’s, Tesco and Waitrose. The CMA’s provisional decision would add Aldi and Lidl to that list.
Will this lower grocery prices for shoppers?
Not directly. The rules govern how and where stores can be built, not shelf prices. The CMA’s goal is more local competition over time, which can support keener pricing, but any effect would be gradual rather than immediate.
When will the decision be final?
The consultation closes on September 7, 2026, and the CMA expects to publish its final decision in the autumn, with reports suggesting a ruling could come as early as October.