CREST-Certified Penetration Testing for UK Businesses
EJN Labs is a UK-based penetration testing firm headquartered in London. We deliver CREST-certified pen testing across the whole of the UK with same-week turnaround. Remote scoping for clients anywhere in the country; on-site visits available wherever you are. Strong financial-services, fintech, and law-firm focus.
A UK pen testing firm. Jurisdiction, timezone, and accountability that match your business.
For UK financial services firms, law practices, FCA-regulated clients, and SaaS startups anywhere in the country, working with a UK-based pen testing firm has real practical advantages: no time-zone offset on critical-finding calls, on-site availability for sensitive engagements (paper records, air-gapped networks, hardware testing), UK jurisdiction for data residency, and remote or in-person scoping wherever you are.
EJN Labs is headquartered at 44-45 Beaufort Court Admirals Way, London E14 9XL. We deliver penetration testing across the entire UK with on-site engagements available within 1-2 business days, wherever you are. Clients across the country benefit from the same FCA-aligned methodology, same-week turnaround on standard engagements, and remote or face-to-face scoping calls.
UK-WIDE DELIVERY
Penetration Testing Services Delivered Across the UK
Every CREST service delivered across the UK with same-week turnaround. Cross-link to specific service pages for detail.
Web App Pen Testing
OWASP Top 10 + ASVS, manual exploitation. UK delivery, same-week turnaround wherever you are.
Mobile App Pen Testing
iOS + Android against OWASP MASVS. Remote or on-site mobile-device testing; bring the devices to our London HQ or we come to you.
External Pen Testing
OSINT-led external attack surface review. UK IP attribution available where threat-model requires.
AWS / Azure / GCP Security
Cloud security review with UK-based delivery. UK data residency throughout the engagement.
Red Teaming
MITRE ATT&CK adversary simulation. On-site initial access (physical, social engineering) available anywhere in mainland UK.
On-site Engagement
Internal network testing, AD attack-path review, paper-record discovery. Delivered on-site at your office anywhere in the UK, typically within 1-2 business days.
Boardroom Briefings
Face-to-face report walkthroughs at your office or our London HQ. Executive briefings prepared for boards and audit committees nationwide.
FCA / PRA Engagement
FCA-regulated firms benefit from CREST-aligned methodology already mapped to SYSC, FG16/5, FG23/3, and Operational Resilience requirements.
Conveyancing & Law
UK law firms across all regions: partner-tier engagement, SRA Cyber Standard alignment, conveyancing fraud defence.
Cyber Insurance
UK underwriters increasingly require CREST-attested testing. We work with major UK insurance brokers (including the Lloyd’s market) on policy renewal evidence.
M&A Cyber Due Diligence
UK PE / VC funds: 5-day cyber due diligence reviews on acquisition targets, with UK-time conference calls and face-to-face partner meetings.
FOUR-PHASE METHODOLOGY
Same-Week CREST Penetration Testing Across the UK
CREST methodology delivered with UK-timezone scoping, on-site availability across mainland UK, and same-week turnaround for clients everywhere.
Same-Day Scoping
Same-Week Test Start
Live Findings
In-Person Report Walkthrough
Verified Accreditations Auditors Accept
Every accreditation independently issued by a recognised UK certification body. Click CREST to verify our membership.
COMPLIANCE READY
Pen Testing Reports Mapped to Every Framework
Same CREST methodology, mapped to the regulatory frameworks UK clients face most often.
FCA Cyber Resilience
SYSC alignment, FG16/5 cyber resilience evidence, FG23/3 Operational Resilience evidence for FCA-regulated firms across the UK.
PRA Operational Resilience
PRA-regulated banks, building societies, insurers, Operational Resilience scenario testing, severe-but-plausible event evidence.
SRA Cyber Standard
Solicitors Regulation Authority Cyber Standard alignment for UK law firms, from City to regional practices.
PCI DSS
Req 11.3 testing evidence for UK e-commerce, payment processors, and PCI-scoped businesses nationwide.
ISO 27001 + SOC 2
Annex A.12.6.1 / Trust Services Criteria mapping for UK SaaS, fintech, and B2B startup clients.
UK Cyber Insurance
CREST-attested testing aligned with UK cyber underwriting requirements, including Lloyd’s market syndicates.
TRANSPARENT PRICING
Transparent UK Penetration Testing Pricing
All UK engagements include same-week turnaround, on-site availability nationwide, and remote or face-to-face report walkthroughs. Price varies by service and scope.
Depends on service + scope
Single-target engagement (web / external / API / mobile). Same-week start. Remote or in-person scoping (at our London HQ or your office).
- ✓Free retests included
- ✓Free rescheduling
- ✓No cancellation fees
- ✓24-hour scope to active testing
- ✓Live findings to client portal
- ✓Executive + technical report
- ✓60-min walkthrough call
- ✓Letter of attestation
Depends on service + scope
Combined engagement (web + API + external + AD). On-site internal testing available anywhere in the UK. FCA / SRA aligned reports.
- ✓Free retests included
- ✓Free rescheduling
- ✓No cancellation fees
- ✓24-hour scope to active testing
- ✓Live findings to client portal
- ✓Executive + technical report
- ✓60-min walkthrough call
- ✓Letter of attestation
Depends on service + scope
Enterprise UK engagement with multiple offices, hybrid cloud, regulated workloads, board-level briefings. M&A cyber DD on demand.
- ✓Free retests included
- ✓Free rescheduling
- ✓No cancellation fees
- ✓24-hour scope to active testing
- ✓Live findings to client portal
- ✓Executive + technical report
- ✓60-min walkthrough call
- ✓Letter of attestation
Penetration Testing for UK Businesses by Sector
We deliver across every major UK sector: financial services, legal, SaaS, healthcare, insurance, public sector. Each engagement is tailored to sector-specific requirements and delivered wherever you are.
Fintech
FCA-regulated firms, Open Banking, payment APIs, PCI scoping.
SaaS
Multi-tenant isolation, SSO/SAML/OIDC, customer-data perimeter, SOC 2 evidence.
Healthcare
NHS DSPT, NHS DTAC, EHR integration, telehealth, patient-data PII.
Insurance
FCA / PRA Operational Resilience, claims data, broker integrations, cyber underwriting evidence.
Law
Privileged-data confidentiality, partner-tier scrutiny, SRA Cyber Standard alignment.
Public Sector
CCS / G-Cloud framework, NCSC-aligned, SC-cleared testers available.
What You Actually Get
Five things that distinguish our service from automated scans and box-tick competitors.
What You Get From CREST Penetration Testing
London HQ, UK-Wide Delivery
FCA / PRA / SRA Specialism
UK-Wide On-Site Delivery
UK CREST + IASME + ISO 27001 + ISO 9001
Frequently Asked
Where is EJN Labs based?
We are headquartered at 44-45 Beaufort Court Admirals Way, London E14 9XL. We deliver across the whole UK; the London HQ is for clients who want face-to-face scoping or in-person workshops. Office visits welcome by appointment.
Do you deliver pen testing on-site?
Yes, anywhere in mainland UK. On-site visits are available within 1-2 business days across most of England, and on 2-day notice for Scotland, Wales, and Northern Ireland. Particularly common for internal network testing, physical red team, paper-record discovery, and air-gapped network engagements where remote access isn’t possible.
Do you charge call-out fees?
No. There are no call-out fees, no travel surcharges, no out-of-pocket expenses for engagements anywhere in mainland UK. Travel is included in the fixed-price quote during scoping.
How quickly can you start an engagement?
Standard engagements start within 24-48 hours of contract signature. On-site engagements within next business day. Emergency engagements (incident-driven, M&A urgency, regulator demand), within 4 hours via our priority pipeline.
Do you specialise in FCA-regulated firms?
Yes. FCA-regulated firms are a major sector for us across the UK. Our CREST-aligned methodology is pre-mapped to FCA SYSC, FG16/5 cyber resilience, FG23/3 Operational Resilience, and PRA SS1/21 outsourcing risk requirements.
Do you work with law firms?
Yes. UK law firms are another major sector for us, from City and Canary Wharf practices to regional centres (Manchester, Birmingham, Leeds, Edinburgh, Bristol) and boutique partnerships. We deliver SRA Cyber Standard-aligned testing, conveyancing fraud defence, partner-tier procurement evidence, and privileged-data confidentiality engagements.
How much does penetration testing cost?
Same UK day-rate pricing wherever you are: small engagements £3,750-£8,000, mid-market £8,000-£18,000, enterprise £18,000+. No location surcharge. UK day rates for CREST-certified testers are £1,000-£1,500 per day.
Can you do face-to-face report walkthroughs?
Yes. Face-to-face report walkthroughs at your office anywhere in the UK, or at our London HQ, are included with mid-tier+ engagements. Particularly useful for board-level briefings, audit committee presentations, and regulator preparation meetings.
Do you work with cyber insurance brokers?
Yes. We routinely produce CREST-attested testing reports for UK cyber insurance underwriting and renewal, including reports accepted by Lloyd’s market cyber syndicates and their broker partners.
Can you do M&A cyber due diligence?
Yes. UK PE / VC funds: 5-day accelerated cyber DD reviews on UK acquisition targets, with UK-timezone conference calls and face-to-face partner meetings at our London HQ or your office. Particularly common for fintech and SaaS deal flow.
Where are your testers based?
Our testers are UK-based, working remotely across the country with on-site visits where the engagement requires it. We match testers to engagements by location and clearance level. SC-cleared testers available for public-sector and defence engagements.
Do you sign NDAs?
Yes. Standard NDA before any technical detail is shared. We operate under a project-specific master agreement that includes data handling, deliverable IP, and breach notification clauses. Particularly important for sensitive UK law and financial-services clients.
20+ CREST-certified testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get my fixed quote in 24 hours
A CREST-certified pen tester will contact you within one business day with a fixed price, a realistic timeline, and the named consultant. Face-to-face meetings available at our London HQ or your office anywhere in the UK.
