Supermarket giants urge CMA to close Aldi and Lidl expansion loophole

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Exterior view of modern Aldi and Lidl supermarket store buildings with company signage

Quick Read

  • Sainsbury’s, Morrisons, and Iceland have formally requested the CMA to end the exemption that allows Aldi and Lidl to use restrictive land covenants.
  • Traditional retailers argue that the discounters have outgrown their ‘limited assortment’ status and now compete directly on a large scale.
  • The CMA is expected to deliver a provisional ruling on the potential regulatory change in July, followed by a final decision in September.

Regulatory pressure mounts on Aldi and Lidl

A high-stakes dispute is unfolding in the UK retail sector as major supermarket chains Sainsbury’s, Morrisons, and Iceland have formally petitioned the Competition and Markets Authority (CMA) to curtail the expansion tactics of discounters Aldi and Lidl. The coalition of traditional retailers is demanding that the regulator close a long-standing loophole that currently allows the German-owned chains to utilize restrictive land-covenant clauses to prevent competitors from opening stores in their proximity.

The current Groceries Market Investigation Controlled Land Order, established in 2010, explicitly prohibits large grocery retailers from employing such restrictive property practices. However, at the time of the order’s inception, Aldi and Lidl were categorized as limited-assortment discounters and were therefore excluded from the mandate. The protesting supermarkets argue that this classification is now obsolete given the rapid market growth, increased store sizes, and broader product offerings of the two chains.

The argument for a level playing field

In their submissions to the CMA, the complaining retailers emphasized that the market landscape has fundamentally shifted. Morrisons noted that the discounters’ price-matching schemes and expanded inventory now place them in direct, aggressive competition with traditional supermarkets. Sainsbury’s stated that the existing regulatory gap creates a serious risk of distorted competition, limiting the ability of other retailers to expand into specific local markets.

To bolster their case, Morrisons and Iceland pointed to the discounters’ own marketing materials, which often claim to provide everything necessary for a “big weekly shop.” They argue that if a retailer is capable of fulfilling a consumer’s full grocery needs, they should be subject to the same regulatory oversight as any other large-scale supermarket. According to Sky News, the petition highlights that the discounters’ typical new store footprints—often exceeding 1,200 square meters—surpass the 1,000-square-meter threshold previously used to define large grocery stores under the 2010 order.

Aldi’s defense of the current model

Aldi has pushed back against these claims, maintaining that its business model remains distinct from that of traditional supermarkets. In its response to the CMA consultation, the company highlighted that it does not operate e-commerce platforms, home delivery services, or specialized counters such as pharmacies, fishmongers, or opticians. Aldi emphasized that its core range consists of approximately 2,000 products, which is a fraction of the 20,000 to 30,000 stock-keeping units (SKUs) typically managed by larger grocery retailers.

The CMA is currently reviewing these submissions as part of a wider consultation. A provisional decision is expected in July, with a final ruling slated for September. The outcome could significantly impact future store development strategies and the degree of competition in local UK markets.

The formal push to reclassify Aldi and Lidl suggests that the traditional retail sector no longer views these discounters as niche participants, but as primary threats to market share that have effectively outgrown the regulatory exemptions granted to them fifteen years ago.

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