Cybersecurity for London businesses —
regulated-grade controls, real on-site presence.
Servnet designs, deploys and runs cybersecurity for London firms with regulators looking over their shoulder — FCA-authorised investment firms in EC2/EC3, SRA-regulated law firms in WC2/EC4, NHS London ICBs, GLA / Westminster public sector and the Tech City fintech scale-ups feeding into them. Cyber Essentials Plus through to Operational Resilience PS21/3, with engineers physically in the building when something goes wrong.
Why London cyber programmes are different
London concentrates the regulated estates of UK financial services, legal practice, central government and major healthcare networks inside a few square miles — and the regulators expect controls to match. London cyber work isn't generic; it sits inside named regulatory frameworks.
FCA / PRA Operational Resilience (PS21/3 + CP19/29)
FCA-authorised firms in the Square Mile and Canary Wharf must identify Important Business Services, set Impact Tolerances and prove they can recover inside them. Servnet maps cyber controls to those tolerances — including the third-party / supply-chain elements regulators are sharpening focus on.
SRA-aligned controls for City law firms
Law firms in WC2, EC1, EC4 carry client-money obligations under SRA Accounts Rules and confidentiality obligations under SRA Standards 6.3 / 6.5 — we design email security, MFA, conditional access and DLP specifically around these obligations.
NHS DSP Toolkit + Network and Information Systems
For the eight London ICBs and the NHS trusts inside them, our cyber controls land directly against DSP Toolkit assertions and the NIS Regulations 2018 — including the NHS-specific Boundary Security and Authentication standards.
NCSC + central-government baselines for Westminster
For SW1, Whitehall and ALB clients we configure to NCSC Cyber Assessment Framework profiles, Cabinet Office MCSS, and where required SC-cleared engineer attendance.
What Servnet cyber delivers in London
NGFW design + deployment (Fortinet, Palo Alto, Cisco, Juniper)
Multi-site FortiGate / PA-Series / Firepower / SRX deployments — including dual-fabric design for City trading floors and resilient WAN edges for multi-borough estates with diverse Internet circuits.
EDR / XDR + 24×7 monitored response
CrowdStrike, SentinelOne and Sophos rollouts with eyes-on-glass triage — London-priority handling for in-hours and out-of-hours alerts, with engineer dispatch into the City inside the agreed SLA.
Identity, MFA and conditional access
Entra ID, Okta and PingFederate hardening — passwordless rollouts for City firms, conditional-access policies that survive an SRA / FCA review, and privileged-access management via CyberArk or BeyondTrust where the role demands it.
Cyber Essentials Plus + ISO 27001 audit support
For London mid-market firms tendering into financial services, NHS or central government, we run Cyber Essentials Plus readiness and assessment — and act as the technical evidence layer behind an ISO 27001 ISMS.
Phishing-resistant email + DMARC enforcement
For City law firms and brokers heavily targeted by BEC, we deploy Mimecast / Proofpoint, get DMARC to p=reject without breaking newsletters, and add Microsoft Defender for Office 365 attack-simulation training.
Incident response retainer with London engineer attendance
Retainer customers get a guaranteed in-hours and out-of-hours response with engineers physically dispatched into any London postcode for an Operational Resilience-grade incident. We hold the forensic kit ready.
London cyber clients we work with
- ▸FCA-authorised investment firmsEC2/EC3 asset managers, brokers and trading firms — Operational Resilience mapping, third-party assurance, trading-floor isolation, FFIEC-aligned controls where US parent applies.
- ▸SRA-regulated law firmsWC2, EC4 magic-circle and mid-market firms — email security, DLP, client-confidentiality controls, mobile device hardening for partners working from Geneva, Hong Kong or New York.
- ▸NHS London ICBs + trustsThe eight London ICBs and their constituent trusts — DSP Toolkit evidence, HSCN-aligned segmentation, clinical-system hardening, medical-device network isolation.
- ▸Central government + ALBsWestminster / Whitehall departments — NCSC CAF mapping, Cabinet Office MCSS, SC / DV cleared engineer attendance, Crown Commercial Service framework supply.
- ▸Tech City fintechEC2A Shoreditch Series A–D scale-ups — pre-FCA-authorisation security posture, AWS / Azure landing-zone hardening, SOC 2 readiness ahead of US enterprise deals.
- ▸Higher education + researchUCL, KCL, Imperial, LSE — research-data classification, JANET edge security, lab-network isolation for funded projects with security clearance requirements.
How we run cyber for London clients
On-site within hours into Square Mile / Canary Wharf
For monitored-response customers, a P1 incident in EC2/EC3/E14 typically has an engineer in motion inside 60 minutes and on-site inside 2 hours from Servnet's Surrey HQ via the M25.
Quarterly operational-resilience reviews
For FCA / SRA customers we run quarterly reviews against the firm's own Impact Tolerances and Important Business Service list — fed straight into the firm's own Senior Management Function attestation cycle.
Out-of-hours change windows that fit City weekends
Trading-floor firewall, EDR rollout or DC migration work happens Friday-night to Sunday-evening so London trading and customer-facing services are clean on Monday open. Engineers are physically on-site for cutover.
Quarterly threat briefings for SMF-accountable execs
For FCA SMF holders we run a 60-minute quarterly briefing — what changed in the threat landscape that affects your firm, where your peers got hit, what the regulator is signalling. Plain English, no jargon, decision-ready.
London cybersecurity — common questions
Do you understand FCA Operational Resilience for City firms?
Yes. We work routinely with FCA-authorised firms on Operational Resilience PS21/3 mapping — identifying Important Business Services, setting and testing Impact Tolerances, and proving the cyber controls under each one. We don't write the policy from scratch (that's your compliance team's lane), but we land controls cleanly against it and produce evidence for SMF attestation.
Can you respond in person to a P1 incident in the Square Mile?
For retainer / monitored-response customers, yes — engineer in motion within 60 minutes of the page and on-site in EC2/EC3/E14 typically inside 2 hours. We hold a forensic kit ready (write-blockers, capture devices, sealed evidence bags) so the engineer arrives able to start work, not just look at logs.
Are your engineers SC or DV cleared for Westminster work?
Where the engagement requires it, yes — we hold a roster of SC-cleared engineers and can arrange DV clearance through the sponsoring department. Most Westminster ALB work is fine with SC; sensitive central-government estates request DV.
Do you do Cyber Essentials Plus assessments yourself?
We run readiness work, remediate the gaps, and assess. We deliver Cyber Essentials Plus regularly for London mid-market firms — from initial scoping to the certificate inside roughly 4–6 weeks for a 50–200 endpoint estate.
Can you handle the NHS DSP Toolkit for a London trust or ICB?
Yes — we work with NHS London ICB-affiliated organisations on DSP Toolkit evidence, particularly the Big Question 6 (technical security) and Big Question 7 (incident response) assertions. We don't become your DPO, but we provide the technical layer behind the toolkit.
How do you price cyber for a 100-user London firm?
Three-tier model — Foundation (CE+ controls, MFA, email security, EDR), Resilience (above + 24×7 monitored response + quarterly review), and Regulated (above + Operational Resilience mapping + incident retainer). Indicative pricing on first call — full quote once we've scoped the estate.
We're a Tech City fintech pre-FCA authorisation — can you get us to the right posture before we apply?
Yes — this is a frequent engagement for us. We work with Shoreditch / EC2A scale-ups to land Cyber Essentials Plus, SOC 2 Type I, ISO 27001 and FCA-authorisation-aligned controls in the right order ahead of the regulatory submission. Most reach a defensible posture in 3–6 months.
Other services we deliver in London
Need a cyber programme that survives a London regulator review?
One call — direct to a cyber engineer who has done this for firms like yours. We'll size the gap honestly and price the closure.