The 2021 Lexington Towers Fire was a major fire that spread quickly through the old Siren Building, that was renamed to Lexington. The fire alarms activated promptly and all evacuation procedures were followed. Floor 6 were not able to access the stairwell due to a fire blocking the corridor leading to the stairwell, however were evacuated through a secondary emergency stairwell.
It started on the 6th floor, and it was unknown that the window frames were bolted terribly to the structure, and many windows fell down causing multiple floors to combust into flames, bypassing all fire doors and walls. Despite this, all 510 users of the building escaped within 5 minutes. By mistake, there were claims that 159 people died, however this was confirmed false as CCTV footage during a post-fire investigation in December 2025 saw all 159 of those presumed dead running away from the building away from the assembly point. All of those 159 decided to stay quiet as they did not want backlash for allegedly "faking their deaths" as they had no choice but to hide when they were presumed dead. The complex confirmed that it was foolish to not be accounted for, which strengthened the current Lexington's Towers policy of using certain doors and having to sign in and out of the building.
The fire started on the 10th of October 2021 and spread into the morning of the 11th. The old Siren Building was unknowingly terribly built with weak steel and weakened concrete, which caused it to buckle on its own weight and collapse at 4:01 AM on the 11th. On the 12th October 2021, an investigation into the under construction skyscraper complex that is now the modern Lexington Towers confirmed that the materials used in the modern building were extremely fire resistant and that in a real fire situation, it would take approximately 2-4 hours for fire to spread outside of a single room, and that it would take atleast a week for the whole building to burn down. It also confirmed that it would not weaken or collapse in the same way the old building did, which relieved anybody moving into the new complex on its opening in 2023.
Through 1-3am, the smoke in the fire was extremely dark, but with bright search lights, the sky was lit up to a daylight degree. The smoke had lightened around 4am but the building had collapsed just minutes later.
The fire's fault was ruled out to undiscovered issues in the building's construction, and the cause was identified as an accidental appliance explosion. The blame was put on nobody.
The Modern Lexington Towers Complex
On the 12th October 2024, a second investigation into the new building's fire compartment system confirmed and stated that the complex is one of the safest buildings in the world, and that any fire situation could be quickly crushed by the building's effective fire sprinkler system, which uses Novec 1230, a gas that can extinguish Class A, B, C and electrical fires, in place of water. The blocked stairwell story was considered "impossible" in the modern building as the building is architectually certified to have extremely low risks of a single stairwell being unusable in a fire due to its fire compartment system, and all stairwells being blocked is statistically impossible. The building has 5 stairwells, soon to be 9 on completion of a horizontal expansion, and all walls and doors of every stairwell are fire resistant for up to 2 hours. This figure does not account for the extremely low fire risks outside every stairwell, and it also does not account for the time taken for a fire to escape its room, pass through the halls and enter the stairwell. The stairwells are all on opposite ends of the building, giving a certain escape in a fire situation.
The complex have a strict rule, that all fire doors without electromagnets that release on the fire alarm, must be kept closed and any staff member caught propping them open will receive a sanction for Building Safety Endangerment
Post-Fire Investigations
Lexington Towers, both the one now and the collapsed one, undergo monthly investigations. For the modern building, the investigations are due for the 5th of each month. The ones in the modern building are to ensure that all compartments maintain 100% of their integrity in case of a fire situation. It also analyses all risks of fire and ensures that the incident cannot repeat. It was certified that it cannot repeat in the same way, however they are making sure that no other bad outcomes are possible. The last major investigation is set for March 1st 2026.
The investigations for the old building are due for the 1st of each month. review CCTV footage from inside the building during the fire. They are attempting to figure out how it started and they analyse anything that lowered the fire resistance of the building to ensure none of it is applied to any building built after it.
These investigations are set to end in August of 2026, as the last thing needed to conclude the report are potential bad outcomes in the newer building, and what caused the initial fire.
These investigations have been going on since the fire. LIA view it as a "necessary hassle" as it costs €120,000 to run every investigation. While the Lexington towers complex alone reels in over 1.5 billion monthly, it is still a hole to the building. LIA covers the cost of the investigations.
In March of 2026, videos from the fire's interview were found on a server, and reviewed by LIA. LIA had initally wanted all media of the fire cleared to prevent fears circulating around nearby buildings, but allowed this media to exist.
The videos were news interviews at the fire's worst, with thick, dark smoke and fire behind the interviewee, and the second clip was the fire as it was spreading, with gray smoke and approximately 20% of the building ablaze.