UK GDPR vs EU GDPR — What’s Actually Different

If your business has customers in both the UK and the EU, you’re navigating two data protection frameworks. They started as the same regulation — the EU GDPR was adopted by the UK before Brexit and retained as UK law. But since January 2021, they’ve been diverging. The Data (Use and Access) Act 2026 accelerated that divergence, and more changes are coming.

You can’t rely on a single privacy policy for both jurisdictions anymore. Understanding the differences so you don’t accidentally drop one side of compliance is essential. Here’s what’s actually different and what’s still the same.

The Core Principle: Still Fundamentally Similar

Both UK GDPR and EU GDPR operate on the same seven data protection principles — lawfulness, fairness, transparency, purpose limitation, data minimisation, accuracy, storage limitation, integrity and confidentiality, and accountability. If you’re compliant with one, you’re most of the way to compliant with the other.

The differences aren’t in philosophy. They’re in details — what counts as a lawful basis, how complaints are handled, what cookie consent looks like, and who enforces the rules.

Where They Diverge

1. Regulatory Enforcement and Penalties

EU GDPR: Enforced by the European Data Protection Board (EDPB) and national Data Protection Authorities in each EU member state (France’s CNIL, Germany’s BfDI, etc.). Maximum fine: €20 million or 4% of global annual turnover, whichever is higher.

UK GDPR: Enforced by the Information Commissioner’s Office (ICO). Maximum fine: £17.5 million or 4% of global annual turnover, whichever is higher.

The practical difference: if you’re operating in both jurisdictions and trigger enforcement, you’re handling two separate regulatory relationships. EU regulators move slowly; the ICO is faster and more aggressive. In 2025, the ICO issued record fines totalling over £20M. The EU EDPB tends toward guidance and soft enforcement for first-time offenders.

2. Lawful Bases and Processing

This is where UK GDPR and EU GDPR are drifting noticeably.

EU GDPR: Six lawful bases (consent, contract, legal obligation, vital interests, public task, legitimate interest). The EU has been tightening the “legitimate interest” standard — guidance increasingly says legitimate interest is only valid if it’s narrow and balanced against individuals’ rights.

UK GDPR: The DUAA (February 2026) clarifies lawful bases and, in some respects, broadens their scope. “Legitimate interest” is still valid, but the UK is being clearer about when it applies (notably for marketing and analytics). For new businesses, this means you may have more flexibility under UK GDPR for certain types of processing, but the compatibility isn’t guaranteed.

Practical impact: If you’re processing data for marketing purposes, UK GDPR lets you rely on legitimate interest more readily than EU GDPR in some cases. But don’t assume compatibility — if you’re in both jurisdictions, use the stricter standard (consent or clear legitimate interest assessment) to cover both.

3. Cookie Consent and PECR

EU GDPR: Cookie consent is technically a matter for the ePrivacy Directive and member state implementation (Germany’s TMG, France’s CNIL rules, etc.), not the GDPR itself. But in practice, EU regulators treat cookie consent as a GDPR consent issue. The standard is strict: you need explicit consent before any non-essential cookie fires.

UK GDPR: The DUAA (February 2026) updates UK cookie consent rules under the Privacy and Electronic Communications Regulations (PECR). The requirement is still strict — explicit consent before non-essential cookies — but the DUAA introduces new compliance pathways. Notably, there’s clearer guidance on what counts as “essential” and new provisions around “technical consent” (cookies required for the site to function technically).

Practical impact: Cookie consent standards are still similar (explicit, granular, easy to withdraw), but the definitions and safe-harbour provisions are subtly different. A cookie banner built for UK GDPR compliance alone may not satisfy EU standards.

4. Data Subject Rights and Complaint Handling

EU GDPR: Five core data subject rights (access, rectification, erasure, portability, objection) plus the right not to be subject to automated decision-making. Complaints go to national DPAs. The EDPB provides guidance but doesn’t directly handle individual complaints.

UK GDPR: Same core rights, but the DUAA (February 2026) changed complaint handling. Complaints now go to the ICO, which has new statutory objectives (balancing privacy with innovation and competition). The ICO’s complaint process is faster and more direct than EU DPA processes.

Practical impact: If a UK customer files a complaint with the ICO, you’ll see enforcement action faster. If an EU customer files a complaint with their national DPA, the process is slower but potentially more expensive (some EU regulators are more aggressive in fines than others).

5. Data Transfers and Adequacy

EU GDPR: Transfers of personal data outside the EU are only lawful if the destination country has an “adequacy decision” from the European Commission. The UK has adequacy with the EU as of June 2021 — so transferring data from an EU company to a UK company is fine without additional safeguards.

UK GDPR: The UK has adopted adequacy decisions for certain countries (including the EU post-6 June 2021), but the list is shorter and the UK’s approach to adequacy is more fragmented. The DUAA also changes how transfers are assessed.

Practical impact: If you’re transferring data between UK and EU systems, you’re fine because of mutual adequacy. But if you’re transferring to the US (no UK adequacy decision, only contractual safeguards) or other countries, the rules differ between jurisdictions. You need separate transfer mechanisms for each.

6. International Data Transfer Mechanisms

EU GDPR: Standard Contractual Clauses (SCCs) are the primary mechanism for lawful international transfers after the Schrems II decision complicated things. Some EU regulators are questioning whether SCCs alone are sufficient for transfers to certain countries (notably the US, where government access is a concern).

UK GDPR: The UK recognizes Standard Contractual Clauses but is taking a more pragmatic approach. Transfers to countries with adequate data protection laws are straightforward. The DUAA simplifies some transfer mechanisms and introduces new pathways (notably “Digital Verification Services” coming later in 2026).

Practical impact: If you’re transferring data to the US, EU GDPR requires SCCs plus potentially additional safeguards (encryption, purpose limitation, etc.). UK GDPR accepts SCCs more readily and is developing clearer transfer pathways.

What’s Still the Same

• Data protection principles: Both jurisdictions operate on the same seven principles.
• Scope: Both apply to any organisation processing personal data of residents (UK residents for UK GDPR, EU residents for EU GDPR).
• Core rights: Access, rectification, erasure, portability, objection, right not to be automated decision-made. Both frameworks grant these.
• Privacy by design: Both require organisations to build privacy into systems from the start.
• Breach notification: Both require breach notification within 72 hours.
• Data Processing Agreements: Both require written agreements if you use third-party processors.

Practical Guidance for Businesses Operating in Both Jurisdictions

If you serve customers in both the UK and EU:

1. Use the stricter standard for shared processing. When requirements diverge (like legitimate interest scope), apply the stricter EU GDPR standard. This keeps you compliant in both jurisdictions without maintaining two separate systems.

2. Maintain two separate privacy policies. One for UK customers (UK GDPR specific), one for EU customers (EU GDPR specific). You can reference both from your website.

3. Document your lawful bases carefully. Be explicit about why you’re processing each type of data. If you’re relying on legitimate interest, document the balancing act you’ve done.

4. For cookie consent, assume you need explicit granular consent. Both jurisdictions require explicit consent for non-essential cookies. Use a consent mechanism that satisfies both (separate toggles, easy withdrawal, no pre-ticked boxes).

5. If you’re transferring data internationally, check adequacy. UK-to-EU transfers are fine because of mutual adequacy. US transfers need SCCs and potentially additional safeguards. Be explicit about where data goes.

6. Monitor DUAA implementation. The DUAA is being rolled out in phases through June 2026. As new provisions come into force, revisit your UK GDPR compliance to ensure you’re covering new requirements.

7. Watch for regulatory guidance. The ICO publishes more prescriptive guidance than EU regulators. The EDPB publishes best-practice guidance. Both matter if you’re in both jurisdictions.

Why This Matters

The UK and EU are moving in slightly different directions. Early-stage divergence is manageable — a privacy policy that’s compliant with both is still possible. But as the DUAA fully takes effect and the ICO publishes detailed guidance, staying compliant with both will require more active management.

For now, the safest approach is to treat UK and EU customers the same way — apply the stricter requirement to both. This costs nothing extra (it’s a few hours of documentation work) and buys you compliance certainty.

If you need help auditing compliance across both jurisdictions, the regulatory landscape is complex but navigable. The cookie compliance hub covers PECR and ePrivacy rules, which layer on top of GDPR in both jurisdictions.

Last updated: 2026-03-23