01 / City
London
The city and its connections.
- Places
- Areas, landmarks and stations.
- Connections
- Transport lines and routes between areas.
- What changes
- Travel conditions, scheduled events and weather.
Trust & transparency
How it
all works.
OnSiren is an urban intelligence platform. We build a digital picture of a place: its landmarks, stations, venues and streets, and what is happening around them.
Alpha One is the AI in the system. It uses that picture to answer questions, explain local conditions and share relevant alerts.
THU APR 233:02 AM
A digital picture of the place
Identify the place.
Build its picture.
We identify and label landmarks, stations, venues and streets, then connect what we know about them.
Zoom from a city to an area to a single venue. Each level connects the places, activity and changes that matter around it.
- 01City
- 02Area
- 03Venue
Interactive example. Explore London, Mayfair and a single venue. Open a place to see its details and connections.
Explore the local picture02 / Area
Mayfair
- Places
- Streets, squares and venues.
- Connections
- Nearby stations and routes through the area.
- What changes
- Local traffic, event timings and access changes.
03 / Venue · Example
A Mayfair gallery
- Place
- Venue name, street location and entrance.
- Connections
- Surrounding streets and nearby places.
- What changes
- Opening times, event schedule and entrance updates.
Illustrative views. A change at one place can affect the area around it. Alpha One uses those connections to explain local conditions and relevant updates. Coverage and timing depend on the connected sources.
How we build it
Build the picture.
Keep it current.
- 01
Identify places.
Identify and label landmarks, stations, venues and streets, including where they are and how they connect.
- 02
Gather information.
Bring together details about places, events and local conditions, alongside observations from people working nearby.
- 03
Put it in context.
Connect each update to the place and time it concerns, so it can be understood alongside other local information.
- 04
Keep it current.
Add new information and revise the picture as conditions change. Alpha One uses the updated picture for answers, briefings and alerts.
Local information
What the picture
includes.
Information about the place and what is happening around it, brought together in one local picture.
Events & venues
Venue information, opening times and event schedules.
Businesses & teams
Local context from event businesses and security teams.
Transport & conditions
Rail updates, road disruption, traffic and weather.
Crime & council information
Recorded crime history, public notices and local council updates.
News & public reports
Reports of developments affecting places and communities.
OnSiren local knowledge
People on the ground.
Our own local knowledge, contributed by local security officers through their observations and reports.
Sample scenario
A concert
at Wembley.
Illustrative event timings and road conditions, connected with Wembley Stadium’s real station approaches.
01 / Connected information
The local picture
Concert timings
Gates 18:30Finish 22:00
Station approaches
Wembley Park station via Olympic Way
Jubilee and Metropolitan lines
Wembley Stadium station via White Horse Bridge
Chiltern Railways
Road access
Heavy traffic is slowing nearby roads. An approach road is closed around the finish time.
02 / Alpha One assessment
Wembley Stadium
The finish time connects the picture.
As the concert ends, people are likely to head towards the stations. Heavy traffic and the road closure may add pressure around open approaches.
Potential effect · Around 22:00
Busier access points.
Queues may take longer to clear.
03 / Relevant alert
ALPHA ONE
Crowd dispersal
AreaWembley Stadium · 22:00
MESSAGE
A concert is due to finish at 22:00. Heavy traffic and a nearby road closure may increase pressure on open approaches. Allow for busier access points and follow your site’s procedures.
Example alerts
Updates that matter
around you.
These examples use OnSiren’s alert design to show how a change becomes useful information. Every card is an illustration, with sample times, areas and inputs. Actual alerts depend on the available evidence.
Shared awareness
Shared awareness.
Relevant alerts.
People and teams following an area can work from the same local picture and contribute observations from the ground.
A security officer can prepare and a venue can plan access. Wider local awareness is what Eagle Eye opens up.
Explore London (opens in a new tab)Responsibility & feedback
Clear roles.
Questions welcome.
Questions about your information?
Contact OnSiren about privacy, the data used by the service or the information behind a briefing.
Who is responsible for Alpha One?
OnSiren operates Alpha One and provides the information service and analysis. Source organisations publish the original material. Officers apply their judgement, training and site procedures when deciding what to do.
Names and links identify sources. Any claim of official partnership or approval requires a separate, explicit basis.
How are safeguards reflected in an answer?
The answer distinguishes reports from assessments, identifies important evidence gaps and uses guidance suited to the question. A routine query receives relevant information. An emergency receives concise guidance and escalation appropriate to the circumstances.
Private information and app actions remain subject to the product’s permissions. Source material cannot grant additional authority.
How can I question or correct information?
Contact OnSiren with the alert or answer, its time and the information you believe needs checking. Include a source link where available and limit personal information to what is needed to understand the issue.
Where do I raise a privacy concern?
The Privacy Policy explains data handling and your rights. Contact the privacy team about access, use, retention or correction of personal information.