Business Law Library & Tracker
Competition, Cartels & Market Conduct
Competitor dealings, pricing, market power, distribution and collusion risk.
Sources last reviewed 28 July 2026
Main law guides
122
Acts, regulations and codes worth reading first
Topics
60
Plain-English clusters
Published case explainers
143
Selected cases with a business lesson
Tracked updates
11
New, amended & reviewed
Plain-English explainers, not legal advice. Use the linked official source for section-level detail, and get advice for your situation.
Get legal helpMain laws
Competition Act 1998
UKPGA 1998 c 41
Digital Markets, Competition and Consumers Act 2024
UKPGA 2024 c 13
Enterprise Act 2002
UKPGA 2002 c 40
Cases
Euro Car Parks Limited v Competition & Markets Authority
The durable lesson is about process discipline and publication risk. If your business gets an information notice from the CMA or another regulator, verify it...
Abbott Diabetes Care Inc v Sinocare Inc & Ors
Do not assume a product’s shape will do the same legal work as a brand name or logo. If customers, clinicians, buyers or distributors mainly identify products by...
Justin Gutmann v Apple Inc & Ors
If your business runs a platform, marketplace or other model that could attract a competition class action, this case is a reminder that funding challenges may not...
Phones 4U Limited (in administration) v EE Limited & Ors
The durable lesson is straightforward. A business can lawfully make a tough commercial decision, even one that rivals may also be considering, but it must make that...
Sky UK Limited v The Office of Communications
The durable lesson is about service classification, not a blanket label for every Sky product. The ruling supports Ofcom’s interpretation for the issue in dispute...
Sony Interactive Entertainment Europe Limited & Anor v Alex Neill Class Representative Limited
If your business faces a funded competition claim, assume the claimant may still have workable third-party funding even after PACCAR. You can still review the...
Thames Water Utilities Holdings Ltd, Re
If your business is heading towards a cash shortfall, the key lesson is to start restructuring work early and build evidence around the real fallback scenario if no...
Thatchers Cider Company Limited v Aldi Stores Limited
The lesson is not that you can never use common flavour cues, category colours or fruit imagery. The problem is pushing the design so far that it deliberately calls...
The Secretary of State for Health and Social Care & Ors v Lundbeck Limited & Ors
For business owners, the lasting lesson is not limited to pharmaceuticals. If your business makes a deal with a competitor that delays entry, restricts selling, or...
Commissioners for HM Revenue and Customs v Professional Game Match Officials Ltd
Flexibility before an assignment does not prevent employment obligations arising during an accepted assignment. Businesses using casual or assignment-by-assignment...
Meta Platforms Inc & Ors v Dr Liza Lovdahl Gormsen
If your business runs a digital service, this case is a warning not to treat user data as a free add-on just because your service has no cash price. The court...
Panasonic Holdings Corporation v Xiaomi Technology UK Limited & Ors
If your business uses standardised technology and is prepared to take a court-determined FRAND licence, say so early, document it clearly and keep that position...
Walter Hugh Merricks CBE v Mastercard Incorporated & Ors
For ordinary businesses, the main lesson is not about running a card scheme. It is about litigation risk travelling through a supply chain. The claim alleged that...
London & South Eastern Railway Limited & Ors v Justin Gutmann
Read this case as a warning about pricing operations and channel design, not as a final statement that the defendants acted unlawfully. The Court of Appeal did not...
The Secretary of State for Transport v Arriva Rail East Midlands Ltd ("Arriva")
If your business is excluded from a tender, do not assume every claim runs on the same clock. This case shows that a private law damages claim may not automatically...