Most B2B data vendors are vague about sourcing. "We use proprietary technology and public web data" is the standard hand-wave. We think sales leaders deserve to know what they're paying for — especially in UK, where data quality varies enormously between countries and providers.
The UK data pipeline
UK Lead Database is built on three layers, in this order:
- Public business registries. Every UK country runs a state-operated business registry — Handelsregister, KVK, Companies House, Registrų Centras, etc. These are the source of truth for "is this company active and registered."
- Public filings + corporate updates. Annual reports, board appointments, address changes, ownership changes — published as official gazette entries or open-data feeds.
- Verification + enrichment. Email verification (SMTP-level), phone validation, LinkedIn URL matching, technology stack detection, hiring signal aggregation.
Country-by-country sourcing
Per-country, here's exactly what we pull from where:
- England (🏴): 5.0M+ companies, 10.5M+ decision makers — sourced from the official business registry, enriched with verified emails and direct phones
- Scotland (🏴): 350K+ companies, 1.0M+ decision makers — sourced from the official business registry, enriched with verified emails and direct phones
- Wales (🏴): 180K+ companies, 550K+ decision makers — sourced from the official business registry, enriched with verified emails and direct phones
- Northern Ireland (🇬🇧): 120K+ companies, 350K+ decision makers — sourced from the official business registry, enriched with verified emails and direct phones
Coverage varies by country — for newer additions to the UK dataset, decision-maker enrichment lands in Q3 2026. Country pages show live counts.
Email verification methodology
Every UK email goes through SMTP-level verification before landing on a record. We re-verify the entire UK dataset on a rolling weekly schedule. Across the live UK dataset, 97% of emails return as deliverable or catch-all-safe.
Crucially: when a UK contact changes job, we flag it on the record. Other vendors quietly let stale emails accumulate; we surface the staleness so your reps don't waste touches.
What's not in our data
To be clear about scope:
- We don't sell scraped LinkedIn profiles. Every contact is anchored to a real UK business registry record.
- We don't sell consumer data. UK Lead Database is B2B-only, every contact has a corporate email or business phone.
- We don't sell intent data sourced from third-party tracking pixels. The "signals" we surface (hiring, funding, tech adoption) come from public sources.
Compliance posture
Every record in UK Lead Database is sourced from public business records — legitimate-interest grounds for B2B outreach under GDPR. Source trail is preserved on every record. We honour opt-outs within 24 hours. Every UK country we cover, we comply with locally.
If you have specific compliance questions for your UK program, book a meeting → and we'll walk through it.