UK GDPR vs EU GDPR for B2B data

When the UK left the EU, it brought the EU GDPR into domestic law as the “UK GDPR”. It is the UK's post-Brexit data protection regime, and it sits alongside the Data Protection Act 2018, which fills in UK-specific detail.

The UK GDPR is enforced by the Information Commissioner's Office (ICO), the UK's independent data protection regulator. In substance it keeps the familiar GDPR framework: the same lawful bases, the same emphasis on transparency, and the same data subject rights.

For most practical purposes, the two regimes remain closely aligned — it's easy to overstate the differences. The principles, lawful bases, and individual rights you work with under the EU GDPR carry over to the UK GDPR. The differences are mostly structural:

• 01Regulator — the ICO supervises the UK GDPR; EU member states have their own national data protection authorities.
• 02Supplementary rules — the UK pairs the UK GDPR with the Data Protection Act 2018 and PECR for electronic communications and cookies.
• 03Enforcement — each regime is enforced separately, so guidance and penalties are issued independently.
• 04Future divergence — the UK can amend its regime over time, so the two may drift apart. Today the gap is small.

If your website attracts both UK and EU traffic, you may be subject to both regimes at once. That sounds onerous, but because the core obligations overlap, a single, well-documented approach usually satisfies both: identify a lawful basis, be transparent, and offer an opt-out.

A tool that operates company-level-first — matching a visit to an organisation rather than a named person — keeps most processing outside the definition of personal data under either regime, and enriches to person-level only where permitted. That consistency is what simplifies compliance across both the UK and the EU. See our guide to the legality of visitor tracking and the GDPR explainer for how Warm AI applies this.

It depends on where your visitors are, not only where your business is based. Processing the personal data of people in the UK can bring you within the UK GDPR; processing the personal data of people in the EU can bring you within the EU GDPR. Many UK B2B sites with any European audience need to consider both.

This is exactly the kind of question where professional advice pays off. A DPO or data protection specialist can map your specific traffic and processing to the right regime (or both) and confirm what your documentation needs to cover.