London, England, UK

London councils hit by cyber attack with data potentially compromised

Several London councils have activated emergency plans after being hit by a cyber attack
that has disrupted core services and may have exposed personal data. Kensington and
Chelsea, Westminster, and Hammersmith & Fulham councils have all confirmed system
outages linked to the incident. Other councils using shared infrastructure may also be
affected as investigations continue.

At this stage, it is not yet known whether any personal information has been compromised.
Councils have stated that a forensic review is underway, and any affected individuals will be
contacted directly once the scope of the breach is confirmed.

What the attack involves

The cyber attack has caused widespread disruption across essential systems including
telephone lines, online portals, and key operational services. According to council
statements and multiple news reports, the incident appears to have targeted shared IT
infrastructure.

While no council has officially confirmed that resident or staff data was accessed, all have
acknowledged that this remains a possibility until the investigation is complete. Specialist cyber-security teams and the National Cyber Security Centre (NCSC) are currently assessing the impact.

Reports from outlets including Sky News, The Independent and the Evening Standard note
that emergency procedures have been triggered, with councils prioritising the restoration of critical services first.

What residents should do

Councils have advised residents to remain cautious while waiting for verified updates. Key steps include:

  • Waiting for direct communication from your council before taking any action.
  • Treating unsolicited emails, calls or texts with caution.
  • Avoiding clicking links shared via social media or third-party sources.
  • Monitoring accounts for anything unusual if you have interacted with affected council services.

Service disruption is expected to continue while investigations progress and systems are
restored.

What happens next

A clearer picture will emerge once forensic analysis confirms whether data was accessed,
which systems were affected, and what corrective measures are needed. Councils will
provide updates through their official channels as soon as more information is available.

We are monitoring the situation closely. Register your interest today, and we will keep you updated if one of our regulated UK partner law firms is able to take this claim forward.

Join the Claim connects consumers with SRA-regulated lawyers. Visit the claim page to check your eligibility if a claim is open with one of our trusted legal partners. If a group action has not yet been launched, you can register your interest and we’ll keep you informed if a partner firm decides to take a claim forward.  

This information is for general guidance only and does not constitute legal or financial advice.

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