The Top High Court Cases of 2026 (So Far)

Do you want to impress law firms in applications and interviews? Then read on.

We've picked out some of the most important cases of 2026 so far plus we explain:

• how they impact law firms
• how you can use them in applications and interviews

Dieselgate Drama

What is the case about?

• Around 1.6 million UK motorists sued car manufacturers, arguing diesel vehicles contained unlawful software designed to manipulate emissions testing.
• The key question was what counts as a prohibited “defeat device” under EU-derived vehicle rules.
• In July 2026, the High Court adopted a narrower test than the European courts, clearing three of the five lead manufacturers entirely and making only partial findings against Mercedes-Benz and Peugeot-Citroen.

Why does it matter?

The narrower test reduces the scope and potential value of the wider claims, which matters directly to the litigation funders and insurers backing them.

It is also a striking example of post-Brexit legal divergence, with an English court taking a different approach to European courts when interpreting rules inherited from EU law.

There is a wider disputes point too: coordinating claims involving more than a million motorists shows how the English courts are adapting to mass litigation at scale.

How to discuss in applications