Leeds
Doncaster
Sheffield
Bradford
Hull
Halifax
Sunderland
Newcastle
Middlesborough
Yorkshire Moors
Teesside
Cumbria
Harrogate
York
Yorkshire Dales
Northumberland
Goole
Carlisle
Keswick
Kendal
Barrow-in-Furness
Lancaster
Blackpool
Morecambe
Southport
Liverpool
Wigan
Manchester
Blackburn
Burnley
Forest of Bowland
Oldham
Chester
Stockport
Peak District
Skipton
Crewe
Rotherham
Stoke
DriffieldThe most operationally demanding survey environments we work in.
Defence & Justice Surveying
Defence and justice sites are categorically different from any other survey environment. It is not simply that access is restricted — it is that the restrictions are non-negotiable, the consequences of getting them wrong are serious, and the operational imperative of the facility takes absolute precedence over the convenience of the survey programme.
Security clearances, method statement approvals, escorted access, phased wing access, equipment submission lists, site induction requirements, coordination with security management teams — these are not obstacles to navigate around. They are the conditions under which the survey must be designed, planned and delivered. A survey firm that treats them as inconveniences rather than requirements is a survey firm that will not be admitted on site, and will not be appointed again.
Site Surveying Services has delivered survey across the defence and justice sector at BAE Systems in Barrow-in-Furness and HMP Manchester. Both are at the demanding end of what security-critical survey requires. Both were delivered without incident, without operational disruption, and with data that met the quality and accuracy specification the client required. That is the standard we hold ourselves to — and the standard the people who appoint us have a right to expect.
Surveying for Defence & Justice Projects
Surveying for Defence & Justice Projects
These sites are often highly sensitive, with restricted access, rigorous security protocols, and strict compliance requirements. The stakes are high: any errors in data can lead to safety risks, compliance failures, or costly rework that compromise both operational capability and public trust.
Why Accuracy Matters...
Ensure compliance
with strict government and defence standards.
Minimise operational downtime
and disruption to secure facilities.
Mitigate risks
in high-security environments through safe, efficient data collection.
Support long-term asset management
with clear, verifiable digital records.
Deliver projects on time
and on budget with minimal room for error.
Innovation in Action
Innovation in Action
By deploying advanced technologies such as laser scanning, SLAM scanners, and UAV platforms, we minimise time on site while capturing robust datasets that comply with security and confidentiality standards. Our expertise ensures sensitive projects can move forward with precision and discretion.
The Defence and Justice Sector in the North West
The Defence and Justice Sector in the North West
The North West has a significant and distinctive concentration of defence and justice infrastructure:
BAE Systems Barrow-in-Furness
One of the UK’s most significant defence industrial facilities. The submarine manufacturing and support programme at Barrow represents a sustained programme of capital works, infrastructure upgrade and facility expansion — all of which require survey at pre-design, pre-construction and as-built stages. Our 2025 delivery of PAS 128 QLA utility mapping and topographic survey at the BAE Systems facility is the most direct demonstration of our capability in this environment.
HMPPS custodial estate in the North West
Lancashire, Greater Manchester and Cumbria together carry a substantial HMPPS prison estate — from Victorian category A prisons including HMP Manchester to newer category B and C facilities. HMPPS capital investment in prison condition improvement, expansion and new build generates survey demand for measured building surveys, utility mapping and topographic survey. Our work at HMP Manchester is the direct demonstration of our capability in this environment.
MOD and military sites
there are several MOD and military establishment sites across the North West and nationally within reach of our office network. Survey on these sites requires the same security clearance framework, escorted access methodology and compliant working practices as the HMPPS estate.
Police and emergency services estates
Lancashire Constabulary, Greater Manchester Police and other North West forces commission survey for station refurbishment, new build and estate management. Security-sensitive but typically less restricted than MOD and custodial environments.
Court and justice buildings
Crown Court buildings, magistrates courts and tribunal facilities across the North West require periodic measured building survey and topographic survey for refurbishment, accessibility improvement and estate management.
Border security and controlled access facilities
Airport security infrastructure, border force facilities and other controlled access government estate in the North West.
What Makes Survey on Defence and Justice Sites Different
What Makes Survey on Defence and Justice Sites Different
The distinction between a security-critical survey and a standard construction survey is not a matter of degree. It is a matter of kind. Understanding that distinction is what determines whether a survey firm can operate effectively on these sites — or whether they create a security incident and are removed.
Personnel clearance before access.
On MOD and HMPPS sites, every person entering the site must be security-cleared by the relevant authority before they can be admitted. This is not an administrative formality — it is a substantive vetting process that takes time and must be initiated well in advance of the survey visit. All personnel nominated for defence and justice surveys are submitted through the appropriate clearance process before any programme planning begins.
Equipment submission and approval.
Survey equipment entering secure sites must be declared and in some cases approved before admission. Electronic equipment, recording devices, GNSS receivers and scanning instruments all fall within the categories that security management teams review. We compile equipment submission lists as part of every method statement for secure site surveys and obtain approval before mobilisation.
Escorted access throughout.
On HMPPS sites, no independent movement within the estate is permitted. Every member of the survey team is accompanied by a member of prison staff for every visit. On MOD sites, access is escorted to different areas of the facility. The survey programme is designed from the outset around the constraints this places on movement, timing and access windows.
Method statement approval.
Method statements and risk assessments for secure site surveys must be reviewed and approved by the site’s security management team before any works begin. This is a substantive review, not a signature on a standard document. We produce method statements specifically written for each secure site, reflecting the operational environment, the security constraints and the working practices required.
Operational precedence.
On an operational prison or MOD facility, the secure operation of the site takes absolute precedence over the survey programme. Callouts, lockdowns, security events and operational priorities can require the survey team to stand down at any point. The survey programme is planned with contingency for this and the team is trained to respond appropriately without question.
Confidentiality.
Data captured on secure sites is handled in accordance with the confidentiality requirements of the client. What we survey, where we surveyed it and what the data shows is not discussed publicly without the client’s explicit consent. The survey records from secure sites are not shared, repurposed or referenced in our marketing materials without specific permission.
Where We Work in the Defence & Justice
MOD and military establishments
survey for facility expansion, infrastructure upgrade, capital maintenance and estate management on active defence industrial and military sites. Security clearance, equipment approval, escorted access and method statement compliance throughout.
Category A and B prisons
measured building surveys, PAS 128 utility mapping and topographic survey on HMPPS category A and B custodial estates. Phased wing access, escorted throughout, no operational disruption. HMP Manchester is our direct case study.
Category C prisons and young offender institutions
the broader HMPPS estate including category C prisons, YOIs and open establishments. Similar access framework, generally lower restriction levels than category A.
Crown Court and magistrates court buildings
measured building surveys, topographic surveys and laser scanning for court estate refurbishment and accessibility improvement. HMCTS estate in the North West.
Police and constabulary estates
station refurbishment, new build and estate management surveys for Lancashire Constabulary, Greater Manchester Police and other NW forces.
Secure training centres and immigration removal centres
survey on Home Office and Ministry of Justice contracted secure facilities requiring similar working practices to the HMPPS estate.
Border security and controlled access facilities
survey on government-controlled access sites where security requirements are defined by the facility operator rather than a standard framework.
Our Services
Topographical Surveys
OS-controlled accurate, efficient and cost effective surveys for highways, civils and development. Cad and BIM-ready output.
PAS 128 utility mapping
Providing the location of underground services in 2D or 3D through qualified utility mapping surveys, using advanced GPR and Electromagnetic Location.
Measured building survey
Delivering accurate as-built information that supports design, refurbishment, planning and construction with the latest technology. Producing reliable drawings and digital models.
Laser Scanning
3D laser scanners capture millions of points per second, creating a point cloud which enables the finer details and the physical site to be viewed remotely.
Mobile mapping
For highway engineers, infrastructure managers, local authorities and contractors working on live road schemes, mobile mapping is now the standard for corridor surveys.
3D Machine control
With decades of supporting major earthworks contractors and large-scale infrastructure schemes, we provide reliable machine control across Lancashire and the wider UK.
Setting out engineers
With strong, long-standing relationships across the civil engineering and construction sector, we supply skilled professionals who keep your projects accurate, efficient and on programme.
bathymetric surveys & river surveys
Using modern technology, we capture detailed underwater and river channel information safely and efficiently – delivering reliable data you can trust.
Stockpile surveys & volumetric analysis
Whether a one-off stockpile measurement or regular monitoring, we deliver reliable, repeatable data tailored to your project using advanced technology.
Control Network Installation
Delivering robust and precise site control systems to support every stage of construction in developments, infrastructure schemes or major earthworks.
aerial & drone surveys
CAA-approved drone operations for aerial mapping, photogrammetry and volumetric analysis, providing a comprehensive view of terrain, structures and landscapes.
3D BIM Modelling
Whether you require an as-built Revit model, federated coordination model or detailed digital twin, our team delivers high quality, design-ready outputs.
survey equipment hire
We offer a vast range of surveying and engineering equipment for hire and will always try to beat a comparable quote. Discover the fleet.
monitoring
Providing reliable monitoring surveys across the UK, delivering precise data that supports risk management, compliance and informed decision making throughout a project lifecycle.
Virtual Tour 3D
An immersive experience which instantly transports your clients to your business, guiding them through your space and creating a seamless experience.
Impermeable area surveys
We deliver georeferenced impermeable area data that drainage engineers and planning consultants can work from directly.
CCTV & Drainage surveys
Acoustic & Noise Assessments
We deliver acoustic and noise assessments, supporting planning applications, discharge of conditions and Environmental Impact Assessments.
Why choose site surveying services
On site. On spec. On time.
fast turnaround
Get a quick quote and a survey team prepared for instruction. When the programme window opens, we're ready.
PAS 128 Accredited
British Standard utility mapping. Quality Level B means physical verification of every service - not just surface evidence.
Lancashire-Based
Headquartered in Clitheroe. We know the North West - the sites, the contractors, the programmes. Local knowledge backed by national capability.
Programme-Critical
Data that works in your environment from day one. BIM to your EIR. CAD to your spec. No reprocessing. No delays to the design team.
Frequently Asked Questions
Frequently Asked Questions
What security clearances do your team hold for MOD and HMPPS sites?
Security clearance requirements vary by site and by the nature of the works being carried out. We manage the clearance process for our personnel on a programme-by-programme basis — submitting personnel nominations through the appropriate clearance channel well in advance of the survey visit. We advise at the time of enquiry on the clearance timeline for your specific site and the information we need to initiate the process.
How do you handle confidentiality on secure site surveys?
Data captured on secure sites is handled in accordance with the confidentiality requirements of the client throughout — from capture to storage to delivery. Survey records from MOD and HMPPS sites are not used in our marketing, shared with third parties or referenced publicly without the client’s explicit consent. The specific confidentiality requirements for your programme are agreed and documented before survey begins.
Can you survey a live operational prison or MOD facility without disrupting operations?
Yes — and our case studies prove it. HMP Manchester and BAE Systems Barrow-in-Furness are both live operational facilities. Both surveys were delivered without disrupting facility operations at any point. The survey programme is designed around the operational requirements of the facility — phased access, escorted throughout, standing down when operational priorities require it, with contingency built in. The secure operation of the facility always takes absolute precedence.
What is your approach to method statements for secure sites?
Method statements for secure site surveys are written specifically for each site — not adapted from standard construction templates. They reflect the specific security constraints identified during pre-survey coordination with the facility’s security management team, the equipment to be used and its classification under the site’s security framework, the access sequence and phasing, and the emergency procedures applicable to the site. They are submitted for review by the security management team before any personnel are admitted.
Do you need to declare your survey equipment before entering a secure site?
Yes. An equipment submission list is compiled as part of the method statement for every secure site survey. All instruments, electronic devices and recording equipment are declared. Where approval is required for specific equipment categories, we obtain it before mobilisation. If any equipment is declined by the security team, we adapt the survey methodology accordingly and advise the client on any implications for the survey scope or accuracy.
What PAS 128 quality level is required on defence and MOD sites?
Quality Level A — physical verification of every service at test points using vacuum excavation — is the appropriate standard on any MOD or defence industrial site where the consequence of a service strike would affect operational capability, endanger personnel or compromise critical infrastructure. On service-dense sites with long development histories, desktop utility records cannot be relied upon. Physical verification before any excavation is not a specification decision — it is the minimum standard that protects the programme, the CDM principal designer and the facility operator.
Are you on any MOD or HMPPS approved supplier frameworks?
Our Constructionline Gold accreditation, RICS regulation, PAS 128 accreditation and Builders Profile registration together constitute the standard compliance profile required for most MOD and HMPPS supply chain pre-qualification frameworks. We work through main contractors and framework contractors on MOD and HMPPS programmes rather than direct framework appointment in most cases. If your programme requires specific framework registration, contact us to discuss and we will advise on the applicable route.