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Security Advisory
Security decisions are only as good as the information they are built on.
Independent physical security audit, risk assessment and advisory for corporate, commercial, residential and maritime environments.
Grey Prism’s assesses how secure a site actually is: what is in place, how it performs under real conditions, where the gaps are, and what should happen next.
Most security failures are not failures of response. They are failures of information. The wrong door was left unlocked because nobody had mapped how the building was actually used. The camera covered the approach but not the exit. The access protocol looked fine on paper and had not been tested in three years. Grey Prism assesses what is actually in place, how well it works under the conditions it will face, and where the gaps are. The result is a clear picture – and a prioritised list of what to do about it.
Most security failures are not failures of response. They are failures of information. The wrong door was left unlocked because nobody had mapped how the building was actually used. The camera covered the approach but not the exit. The access protocol looked fine on paper and had not been tested in three years. Grey Prism assesses what is actually in place, how well it works under the conditions it will face, and where the gaps are. The result is a clear picture – and a prioritised list of what to do about it.
clients
Who we work with
Corporate leadership and facilities teams
Responsible for the security of offices, headquarters, data centres and multi-site portfolios. Grey Prism provides the independent review and documented findings needed for governance, insurance and board reporting.
Private estates and residential principals
Seeking an independent view of their homes, grounds and household security, with a prioritised list of what to do next. Delivered discreetly, with minimal disruption to how the household runs.
Maritime clients
Responsible for the security of yachts, superyachts and associated shoreside operations. Crew readiness, port security and voyage risk evaluated to a documented standard.
Venues and event operators
Preparing for their obligations under Martyn’s Law. Grey Prism supports venues in understanding where they stand, what is required, and how to get there before the Act comes into force.
Law firms and family offices
Commissioning independent security reviews on behalf of clients. Privilege-aware, professionally documented, structured to sit alongside legal or financial advisory work.
insight
Martyn’s Law readiness (for venues and events)
For venues that are likely to fall in scope, Grey Prism assesses current preparedness and identifies what needs to be in place before the Act comes into force. For a more detailed breakdown of Martyn’s Law and its implications, see the firm’s separate briefing.
Insight
Understanding Martyn's Law — what it means for your premises
read more
Security Assessment
What you receive
Every engagement is scoped to the site, the threat picture and how much risk the client is prepared to carry.
How it works
How an engagement works
01
Initial consultation
Grey Prism starts with the site, not the checklist. Before anything else, the team needs to understand how the premises actually functions – who has access, how people move through it, and where the real exposure sits. That picture shapes everything that follows.
02
Threat and risk assessment
Before any physical audit begins, the threat landscape relevant to the premises, sector and profile is assessed. That assessment sets the focus – it changes what is looked at and where.
03
On-site security audit
A structured assessment of physical security, access control, procedural effectiveness and how staff respond under pressure. The site is observed as it operates in practice, not just as it appears in a procedure document. Planned around operations with minimal disruption.
04
Analysis and reporting
A written report that separates immediate actions from longer-term improvements, so governance decisions and budget conversations can happen on the basis of what actually matters first. Clear enough for the board, specific enough for the people doing the work.
05
Implementation and follow-up
Where changes are needed, Grey Prism can oversee implementation: managing contractors, tracking progress against the agreed plan, and updating the risk picture as work completes. For clients with Martyn’s Law obligations, ongoing advisory keeps the organisation current as the Act comes into force.
why grey prism
Grey Prism combines strategic advisory, intelligence capability, and discreet operational support to help organisations manage risk with clarity and confidence.
Assessed by people who have been on the other side
The team has planned and executed operations where finding a way in – or staying hidden once inside – was the objective. When Grey Prism walks a site now, that is still the frame: how would someone get in, where would they go, and what would the cameras miss. That is what shapes the assessment.
The report is the beginning, not the end
Most assessments produce a report and stop. Grey Prism provides implementation oversight where changes are needed, and follow-up advisory where the picture shifts. ISO 9001 certified: every engagement documented to an auditable standard.
One team across the full threat picture
A physical security audit sometimes reveals something beyond its original scope: a surveillance threat, an aerial exposure, a crisis response gap. Grey Prism operates across TSCM, counter-drone advisory, protective security and intelligence. If the picture is wider than expected, advice can follow it.
FAQs
Common questions
Do you carry out a security audit, a risk assessment, or both?
A security audit evaluates what is currently in place. A risk assessment looks at the threats you face and how vulnerable you are to them. Grey Prism typically does both. Recommendations need to be grounded in the threat picture as well as the current state of security.
How long does an assessment take?
It depends on the size and complexity of the environment. A single corporate office might take one to two days on site. A multi-site portfolio, a large estate or a maritime assessment will take longer. Every engagement is scoped before it begins.
Will it disrupt our operations?
Work is planned around your operations and your schedule. Most clients find the on-site element straightforward to accommodate.
How is pricing handled?
Every engagement is scoped individually based on the environment, the complexity and the level of assurance required. A written proposal is provided before any work begins.
How do you handle confidentiality?
Communications, scheduling and reporting are handled with discretion throughout. Confidentiality is standard, with NDAs available from first contact.
What types of environment do you work in?
Corporate offices, headquarters, data centres, commercial premises, private residences, estates, yachts, vessels, venues and events.
Can you help implement the recommendations?
Yes. Grey Prism can provide project oversight for the implementation of recommended security enhancements through to completion.
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