UK GDPR After Brexit: How It Differs from EU GDPR

Two Regimes That Started Identical

When the United Kingdom left the European Union, it did not abandon the GDPR — it copied it. The EU GDPR was retained in domestic law and renamed the UK GDPR, sitting alongside the Data Protection Act 2018. On day one, the two regimes were almost word-for-word identical. The difference is what has happened since: the EU and UK now evolve their rules separately, and the gap between them widens with each reform.

For a website owner, this matters in two practical ways. First, if you serve visitors in both the EU and the UK, you are subject to both regimes at once and must satisfy whichever is stricter on any given point. Second, the UK has its own regulator, its own cookie rules, and its own reform agenda — so "we comply with EU GDPR" is no longer a complete answer for British traffic.

This guide assumes you already understand the GDPR baseline. If you do not, read What Is GDPR? and GDPR Requirements for Websites first, then return here for what is specifically different in the UK.

The ICO: One Regulator, Not Twenty-Seven

In the EU, enforcement is spread across one supervisory authority per member state, coordinated through the European Data Protection Board, with a "one-stop-shop" mechanism for cross-border cases. In the UK, there is a single regulator: the Information Commissioner's Office (ICO).

This single-regulator structure has real consequences. The ICO publishes its own detailed guidance — on cookies, legitimate interests, consent, and direct marketing — and that guidance is what your UK-facing site is measured against. The ICO has historically taken a more guidance-and-engagement-led approach than some EU authorities, but it retains the power to issue substantial fines, and it has signalled a sharper focus on website cookie practices, including non-compliant banners that make rejecting harder than accepting.

PECR: The UK's Cookie Rulebook

The most important UK-specific detail for website owners is that cookie consent is not governed by the UK GDPR alone. It is governed by the Privacy and Electronic Communications Regulations (PECR) — the UK's implementation of the EU ePrivacy Directive, retained after Brexit. PECR sits on top of the UK GDPR: PECR sets the rule that you need consent to store or access information on a user's device, and the UK GDPR defines what valid consent looks like.

The practical PECR requirements mirror the EU position closely:

• Consent before non-essential cookies. Analytics, advertising, and personalisation cookies require prior consent. Only cookies strictly necessary for a service the user requested are exempt.
• No pre-ticked boxes. Consent must be a positive action.
• Easy refusal. The ICO has been explicit that "reject all" should be as accessible as "accept all".
• Clear information. Users must be told what cookies do before they decide.

Because PECR is so close to the EU ePrivacy regime, a banner built for GDPR will generally satisfy PECR too — provided it genuinely blocks tags until consent. See How to Block Scripts Until Cookie Consent for the enforcement layer that turns a banner into actual compliance.

Where the UK Has Diverged

The UK has pursued a reform agenda aimed at reducing compliance burden while, in its view, preserving high data-protection standards. The headline changes that affect websites and digital businesses include:

• Cookies and analytics. A move toward exempting some low-risk analytics and functional cookies from the prior-consent requirement — a clear point of difference from the EU.
• Cookie-consent enforcement. Stronger fining powers under PECR, bringing penalties closer to GDPR-level rather than the older, much lower PECR caps.
• Accountability records. Reform of some record-keeping and DPO-style obligations, with a focus on a risk-based 'senior responsible individual' model rather than the EU's prescriptive Data Protection Officer rules.
• Legitimate interests. A list of 'recognised legitimate interests' for which the balancing test is treated as already met, giving businesses more certainty.

None of these changes remove the core obligations — lawful basis, transparency, security, and respecting data-subject rights all remain. They adjust the edges. The risk for an unwary operator is assuming the UK is now 'lighter' across the board; in cookie terms it may be, but in most respects the duties are unchanged.

International Transfers and Adequacy

A crucial post-Brexit question is whether data can flow freely between the EU and the UK. The European Commission granted the UK an adequacy decision, meaning EU personal data can be transferred to the UK without additional safeguards. That decision is, however, conditional and subject to periodic review — if the UK diverges too far from EU standards, adequacy could be challenged or lapse.

The UK, for its part, operates its own transfer mechanism. Instead of relying solely on EU Standard Contractual Clauses, UK exporters use the International Data Transfer Agreement (IDTA) or the UK Addendum to the EU SCCs when sending personal data abroad. If your business moves data across the EU-UK border in both directions, you may need to satisfy both frameworks.

Related Guides

Compare frameworks with What Is GDPR? and LGPD Compliance for Websites, and see GDPR Requirements for Websites for the shared baseline. Authoritative sources include the ICO's UK GDPR guidance and the ICO's Guide to PECR.