Anti-Competition Law in the UK Explained

Running a growing business is exciting - but there are a few competition law traps that can catch SMEs off guard. Even everyday sales tactics or contract clauses can cross the line into “anti-competition” without you realising.

In this guide, we’ll break down what anti-competition means under UK law, which practices are risky, how penalties work, and the practical steps you can take to stay compliant while still competing hard and growing your business.

What Does “Anti-Competition” Mean Under UK Law?

“Anti-competition” (or anti-competitive behaviour) covers business conduct that prevents, restricts or distorts competition. In the UK, the key rules sit in the Competition Act 1998 and the Enterprise Act 2002. Together, they prohibit anti-competitive agreements and the abuse of a dominant position. The Competition and Markets Authority (CMA) is the main regulator, and it can enforce against both companies and, in serious cartel cases, individuals.

In simple terms, UK competition law aims to keep markets fair so customers benefit from choice, quality and good prices. The law targets two broad categories:

• Anti-competitive agreements between businesses (for example, price-fixing or agreeing to split customers).
• Abuse of dominance by businesses with substantial market power (for example, exclusionary tactics designed to shut out rivals).

Importantly, you don’t have to be a large company to fall under these rules. Small businesses can - and do - get caught out, especially with distribution terms and information-sharing.

Which Business Practices Are Likely To Breach Competition Law?

Not every deal or clause is anti-competitive, but some practices are red flags. Here are the big ones to watch.

Cartels And “Hardcore” Collusion

These are the most serious breaches. They include:

• Price-fixing - agreeing prices or price elements with competitors.
• Market/customer allocation - agreeing not to compete in certain areas or for certain clients.
• Bid-rigging - coordinating tenders so one party “wins”.
• Limiting output - agreeing to restrict production or supply.

These arrangements are unlawful even if they’re informal, unwritten or described as a “gentleman’s agreement”.

Sharing Sensitive Information With Competitors

Exchanging commercially sensitive information (for example, future pricing, discounts, costs, sales volumes, capacity or key customers) can reduce uncertainty in the market and soften competition. Direct sharing (meetings, WhatsApp groups, industry forums) and indirect sharing (via a common supplier or trade association) are risky. Stick to historic, aggregated information where possible and have a clear agenda when meeting industry peers.

Vertical Restrictions (Supplier–Distributor Arrangements)

Vertical agreements are common - think distribution, agency or franchise arrangements. Many are lawful, but some restrictions can be problematic, such as:

• Resale price maintenance (RPM) - requiring or pressuring resellers to stick to a minimum price. Setting minimum resale prices is generally prohibited. You can provide a recommended resale price (RRP), but it must genuinely be a recommendation - more on RRP below.
• Wide most-favoured-nation (MFN) clauses - preventing a seller from offering better terms on any other channel or platform can restrict competition.
• Exclusive distribution or exclusive purchasing - exclusivity isn’t automatically unlawful, but it needs sensible limits and justification to avoid foreclosing rivals.
• Platform restrictions - limitations on online marketplaces require careful drafting under the UK’s Vertical Agreements Block Exemption Order (VABEO).

Abuse Of A Dominant Position

If your business has significant market power (dominance depends on market share and other factors), you must not exploit it to exclude rivals or treat customers unfairly. Examples include excessively low “predatory” pricing designed to push rivals out, margin squeezes, or tying/bundling products to shut out competitors. Read more about the risks of predatory pricing if you compete aggressively on price.

No-Poach Or Wage-Fixing Agreements

Agreements between competitors not to hire each other’s staff, or to fix pay/benefits, are an emerging enforcement focus in the UK and can be treated like serious collusion. If you collaborate with competitors (for example, in a joint project), make sure any HR arrangements are lawful and limited to what’s genuinely necessary for the project.

Are Common Clauses In Your Contracts Anti-Competitive?

Plenty of SMEs rely on supply, distribution, agency and reseller arrangements. These can be pro-competitive when structured well - but certain clauses raise risk. If in doubt, get a Contract Review before signing or rolling out a template.

Resale Pricing And Discount Controls

You can set your own wholesale prices, but you generally cannot control the price at which your distributors or retailers resell. Clauses that fix minimum resale prices, punish discounting, or require pre-approval of promotions usually amount to RPM and are high risk. You may use a genuine RRP and recommended promotions, but they can’t be enforced or made a condition of supply. If you operate a channel network, consider a compliant Reseller Agreement or Distribution Agreement that sets brand standards without controlling resale prices.

Exclusivity

An exclusivity clause can promote investment and quality control, but duration, scope and market coverage matter. If exclusivity forecloses a large chunk of the market or prevents retailers from stocking competing brands without good reason, it may be problematic - especially where a supplier or buyer is large.

Most-Favoured Terms (MFNs)

MFN clauses promise the “best” terms you give to any customer or channel. Narrow MFNs (limited to a defined channel) are sometimes acceptable. Broad MFNs (across all routes to market) can deter discounting and restrict competitive entry, so they need careful justification and tight drafting.

Non-Compete And Non-Solicitation

Non-compete restrictions in commercial agreements should be no wider than necessary in geography, product scope and time. Overbroad restrictions can be unenforceable and may also raise competition issues if they hinder market entry. If you need restraints, make sure your non-compete clauses and any non-solicitation terms are tailored to legitimate business interests (for example, protecting confidential information or a specific investment) and kept proportionate.

Agency vs Distribution

True agency (where the agent sells on your behalf and you set the retail price) is treated differently to distribution (where a distributor buys and resells as principal). Identify the right model and use an appropriate agency agreement or distribution/reseller framework to manage competition risk and commercial control.

What Are The Penalties And Who Enforces The Rules?

The CMA can investigate suspected infringements using compulsory information requests, inspections and interviews. Investigations can also involve “dawn raids” at business premises. If the CMA finds a breach, it can impose heavy penalties, including:

• Fines - up to 10% of worldwide turnover for businesses involved in anti-competitive agreements or abuse of dominance.
• Director disqualification - up to 15 years in serious cases.
• Criminal sanctions - the cartel offence can lead to individual fines and imprisonment for the most serious collusion.
• Follow-on damages claims - customers may sue for compensation if they’ve suffered loss due to a breach.

The CMA also runs leniency programmes: the first business to report a cartel and cooperate may receive immunity or reduced penalties. If you suspect a potential breach, seek legal advice immediately - acting early can make a significant difference.

How Do Vertical Agreements Get Assessed (VABEO)?

Most small businesses encounter competition law through “vertical” agreements with suppliers, dealers or online platforms. The UK’s Vertical Agreements Block Exemption Order (VABEO) provides a safe harbour for many vertical restrictions where both parties’ market shares are below 30% and no “hardcore” restrictions (like RPM) are present.

VABEO isn’t a free pass: it sets conditions and identifies high-risk clauses (such as wide MFNs and RPM). If you exceed the thresholds or include hardcore restrictions, you may lose the safe harbour and a case-by-case assessment applies. Getting the structure and drafting right at the outset saves headaches later.

Practical Scenarios For SMEs (And How To Respond)

A Supplier Asks You To Stick To RRP

Offering a recommended price is fine; enforcing it is not. If a supplier insists you never discount or threatens to cut supply if you do, that likely amounts to RPM. Point out that RRP must be a genuine recommendation and that you set your own resale prices.

You Want A Territory-Exclusive Distributor

Territorial exclusivity can be lawful if proportionate. Limit the scope (clear territory, reasonable term), avoid hardcore restrictions (for example, RPM), and ensure the arrangement doesn’t foreclose the market. Use a well-drafted Distribution Agreement to balance brand protection and competition compliance.

You Sell Through Resellers And Want Brand Control

Brand guidelines and quality standards are fine; dictating resale prices and unjustified platform bans are risky. Build a compliant Reseller Agreement that focuses on quality criteria, marketing standards, and lawful promotion rules.

A Marketplace Requires “Best Price” Clauses

A broad MFN that ties your hands across all channels could limit competition. Negotiate a narrower clause or objective service-level commitments instead. Sense-check these provisions under VABEO and your market position.

Considering A Collaboration With A Competitor

Joint bidding or R&D can be pro-competitive if it achieves efficiencies you couldn’t reach alone. However, sharing sensitive future pricing or customer strategies is not okay. Use clean teams, clearly defined scopes and document the pro-competitive objectives.

Competing On Price In A Tight Market

Low pricing is legal - unless it’s below cost with the intent of excluding rivals and you hold market power. If you’re large in your niche, review your pricing strategy to ensure you’re not veering into predatory pricing.

How To Build A Simple Competition Law Compliance Programme

Putting a light-touch compliance framework in place can significantly reduce risk. Here’s a practical approach for SMEs.

• Map your risk areas - sales and pricing, trade association activity, supplier and reseller terms, platform agreements, and any competitor collaborations.
• Update your contracts - remove or redraft high-risk clauses (RPM, broad MFNs, overbroad restraints). Use the right form: agency vs distribution vs reseller. Consider a targeted Contract Review of your standard terms.
• Create a “do/don’t” guide - a one-page summary for staff: don’t discuss future prices with competitors; don’t agree territory splits; okay to discuss public, historic information; escalate anything uncertain.
• Train your team - short, role‑specific training for sales, procurement and leadership. Refresh annually and when people move roles.
• Trade association hygiene - pre-approve agendas, avoid sensitive topics, and take notes. Leave meetings where problematic discussions arise.
• Dawn raid protocol - have a simple checklist: who to call, what staff should (and shouldn’t) do, and how to preserve documents.
• Document decisions - keep written justification for exclusivity, platform restrictions or other vertical restraints (objective efficiency reasons, scope and time limits).

It can feel like a lot, but a practical, proportionate programme is entirely achievable - and it protects your business as you grow.

What Legal Documents Should You Review Or Update?

If you sell through third parties or rely on key suppliers, it’s worth putting compliant, purpose-built agreements in place:

• Distribution Agreement - where a distributor buys and resells your products in a territory.
• Reseller Agreement - for channel partners, with quality standards and lawful promotions (not RPM).
• Agency Agreement - where an agent sells on your behalf and you set end prices.
• Exclusivity clause - ensure scope, duration and market impact are proportionate and justified.
• Non-compete clauses - keep restraints no wider than necessary to protect legitimate interests.
• Internal policies - competition law policy, trade association guidance, and a dawn raid protocol.

Avoid generic templates - vertical agreements need tailoring to your routes to market, sector dynamics and the UK rules (including VABEO). Professionally drafted contracts will give you control and compliance without undermining your commercial objectives.

Key Takeaways

• Anti-competitive behaviour covers collusion between competitors, risky vertical restrictions (like RPM), and abusing a dominant position - all prohibited under the Competition Act 1998.
• Serious breaches attract heavy penalties: fines up to 10% of worldwide turnover, director disqualification, criminal liability in cartel cases, and follow‑on damages claims.
• Everyday clauses can create risk. Watch for minimum resale prices, broad MFNs, overbroad exclusivity, and sweeping non-compete restrictions - structure and draft these carefully.
• For supplier–reseller arrangements, use compliant tools: a tailored Reseller Agreement, a Distribution Agreement or a true agency agreement, and avoid RPM.
• Build a proportionate compliance programme: practical training, a clear do/don’t guide, trade association hygiene, and a dawn raid protocol.
• If in doubt, get a quick Contract Review before signing or rolling out network terms - early advice is far cheaper than enforcement action.

If you’d like help reviewing your agreements or setting up a simple competition law compliance programme, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.