Highlighted terminology is explained at the bottom of the page.


The Civil Aviation Authority (CAA) has approved CI Forensics Ltd, for which CollisionExperts is a trading name of, for daytime and nighttime flight operations and has issued a Permission for Commercial Operations (PfCO).

We offer a nationwide professional Unmanned Aerial Vehicle (UAV) imagery production service for collision investigation. Numerous industries use the capabilities of UAV aerial platforms to identify and record items of interest.

It is vital that the collision scenario and collision sequence of a case be both visually and cognitively understood by those tasked with forming judgements on others. At present, it is common practice to show a sequence of photographs and a two-dimensional scale plan of the collision scene. Unfortunately, the evidence and details of the collision sequence are then given orally, and it is often difficult for those involved to mentally relate and place the various geographical points of the collision sequence together.

Typically the shown photographs are quickly flicked through and have no annotations showing how they relate to the collision scenario. To counter this, we not only record the collision site in top plan view and produce orthomosaics, but we also produce 360 degrees orbital imagery. Furthermore, we record from multiple vantage points and fly above the approach paths of the collision-involved vehicles. Where required by our clients, we insert collision infographics over the videography.

We produce videography from full HD up to 4K UHD or any resolution our clients require. Furthermore, we operate a range of Small Unmanned Aerial Systems (SUAS) that best suit the flight operating requirements of the case.

Our UAV services are not limited to only forensic collision investigation, we also provide:

Geographical crime scene overviews
Incident locality overviews
3D road profiling
3D environmental profiling
Crop monitoring
Industrial inspections
Volumetric and site mapping

The quality and impactfulness of UAV aerial imagery vary depending on the complexity of the collision scenario, the location of the collision site, the road geometry of the approach paths and any additional investigative methods employed.

To achieve the best evidence, we suggest our clients take full advantage of this service to create all-encompassing accurate imagery of the collision site, which can be both shown and used by those involved in forming judgements.

Please contact us to discuss your requirements.


infographic overlays

Infographic overlays are the visualisation of our objective analysis and, where required, our expert opinion. Correctly timed and placed infographics allow others to not only view the collision site through videography, but to have the fundamental and critical reconstruction information overlayed at the same time.

A critical factor in the production and credibility of an aerial infographic overlay is that the author is a forensic collision investigator who applies their knowledge and reconstruction of the collision sequence and collision dynamics to overlay and correlate the identified collision scene evidence.

We overlay any information a client requires, such as the geographical locations of the point of impact, the point of evasive action, the point of encroachment, the point of possible perception and many others.

Please contact us to discuss your requirements.


3D Profiling

Not only do we 3D profile the road geometry at collision sites, but collision scenario specific, we record the road profile.

This 3D profiling is vital when relaying undulating approach paths and the associated points of possible perception to those tasked with judging the actions of others.

3D profiling accurately shows both the vertical and horizontal makeup of a collision site. This profiling is extremely beneficial in cases where vehicles have collided in sag curves or on the top of, or the trailing edges of, crest curves. The road gradient, camber, crossfall and superelevations are all factors that can be visually shown in the profiling.

Please contact us to discuss your requirements.


forensic animations

Although we have access to Google Maps and Google’s terrain elevation data through Googles Maps Platform and an Applications Programming Interface (API), both our computer simulation and forensic animation services more accurately display the collision site through the use of our aerial imagery compared to the historical images provided by Google Maps.

To best visually represent the collision scenario, we strongly advise that our UAV aerial imagery complement our computer simulations and subsequent forensic animations.

Please contact us to discuss your requirements.



An orthomosaic is a series of programmatically sequenced individual aerial images forming a new composite image which is geometrically corrected. Unlike an uncorrected aerial photograph, orthomosaic imagery can be used to measure true distances, because it is an accurate representation of the Earth’s surface, having been adjusted for topographic relief, lens distortion, and camera tilt.

For large geographical collision scenes where the approach paths of road users are paramount to the occurrence of a collision, we strongly advise that an orthomosaic is produced and printed for not only trial evidence, but for case conferences.

Please contact us to discuss your requirements.


Flight Safety

Safety is our priority and takes precedence over any other consideration and includes the matters of instruction. Our mission is to operate at the highest standards and comply with all regulations and obligations laid down by the CAA and our operations manual. Under no circumstances will any pilot operate a SUAS outside of the laid down procedures or the Permission for Commercial Operations awarded by the CAA. We adhere to our safety management system and it is our policy to take all appropriate measures to ensure the protection of the public and its property during our flight activities.

We have separate flight operations insurance to the value of £1,000,000, which meets the requirements of EC Regulation No. 785/2004.

We are fully aware of and minimise, the collection of images which may identify individuals. We are registered with the Information Commissioner’s Office with a tier 1 certification; please click here to view it.

We have policies for General Data Protection Regulation and the Data Protection Act 2018.

When we operate from private land, we do so with the written permission of the Landowner.

We monitor the National Air Traffic Service (NATS) bulletins and make exhaustive flight safety enquiries before any operations commence.

We have permission from the Civil Aviation Authority for commercial aerial work, including both daytime and nighttime flying operations. Please click here to view it.

We have over ten years of experience flying, building and programming UAVs.

We have produced our own Volume 1 Operation and Volume 2 System manuals.

We adhere to strict responsibilities for flight safety and maintenance procedures.

We are currently assisting international autonomous UAV application developers for the forensic mapping of collision scenes.

Mr Beavis has a Certificate of Recommendation issued under the terms of approval granted to NQE: 0116/1625, by the UK CAA under Article 268 of the Air Navigation Order. Please click here to view it.

Mr Beavis has a Certificate of Competence in Remote Pilot Theoretical Knowledge/General Airmanship Syllabus as set out in CAP 722 Appendix E29 (Obligations of the Holder) and in accordance with the terms of approval granted to NQE: 0116/1625. Please click here to view it.

Mr Beavis has a Certificate of Practical Flight Assessment confirming competence to operate a 0-20 kg multirotor SUA/SUSA as set out in CAP 722 Appendix E28 (Privileges of an NQE) and in accordance with the terms of Approval granted to NQE: 0116/1625. Please click here to view it.


Fees & Lead Times

Our service level agreements for fees and lead times for our UAV aerial imagery services vary due to the complexity of each case and any additional investigative services required.

This service is part of our all-inclusive investigative reconstruction package.

Please contact us to discuss your requirements.



4K UHD – An ultra high-definition video mode characterised by 3840 pixels displayed across the screen horizontally and 2160 pixels down the screen vertically.

Approach Path – The geometric description of the course over ground of the collision-involved vehicles, objects or persons during the pre-collision phase.

Camber – The transverse convexity given to the surface of a carriageway or footway.

Collision Dynamics – The forces and motions occurring during a collision due to the interaction and engagement of collision-involved vehicles, objects or persons.

Collision Environment - The settings, surroundings and conditions concerning a collision site at the time of a collision.

Collision Involved Vehicle – A vehicle directly related to a collision.

Collision Scenario – The circumstances of a collision.

Collision Scene Evidence – Evidence from the collision scene concerning the pre-collision and collision phases.

Collision Site - The geographical location of a collision scene.

Collision Sequence – The chronological sequence of events involving the collision-involved vehicles, objects or persons.

Computer Simulation - The reproduction of the behavior of a system using a computer to simulate the outcomes of a mathematical model.

Crossfall – The slope at right-angles to the alignment of any part of the carriageway.

Full HD - 1080p is a set of HDTV high-definition video modes characterised by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen vertically.

Orthomosaic Imagery - Aerial images geometrically corrected such that the scale is uniform.

Point of Encroachment – The place and time of advancement beyond usual and acceptable limits.

Point of Evasive Action – The place and time of the first action taken by any of the road users able to influence their motion to avoid a collision or reduce its severity.

Point of Impact – The place and time of the initial touching of the collision-involved vehicles, objects or persons.

Point of Possible Perception – The place and time at which a normally attentive road user could have first perceived the hazardous situation.

Point of Rest – The place and time where the collision-involved vehicles, objects or persons come to rest.

Road Geometry – The geometric design of roads concerned with the positioning of the physical elements of it according to standards and constraints.

Road Profile – The longitudinal side view of the road geometry.

Superelevation – The vertical distance between the heights of the inner and outer edges of the carriageway.



our Services

All Inclusive Service Collision Accident

All-Inclusive Investigation

Collision Reconstruction Collision Accident

Investigative Reconstructions
Desktop Analysis Collision Accident

Desktop Analysis
Claim Validation

Claim Validations
Vehicle Examinations Collision Accident

Vehicle Examinations
Laser Scanning Collision Accident

3D Laser Scanning
Forensic Animations Collision Accident

Forensic Animations
CCTV Digital Video Analysis Collision Accident

Digital Video Analysis
Collision Site Analysis Collision Accident

Collision Site Analysis
UAV Collision Accident

UAV Aerial Imagery
Collision Accident Computer Simulations

Computer Simulations
Collision Accident Vehicle Forensics Infortainment

Vehicle Forensics
Collision Accident Crash Data Analysis

Crash Data Analysis
Collision Accident Light Bulb Analysis

Lamp Analysis
Collision Accident Seat Belts

Seat Belt Examinations
Incident Analysis

Incident Analysis
Collision Accident Photography

Site Photography
Collision Accident Scale Plan

Scale Plans
Collision Accident Report Validation

Report Confirmations