After a cyber attack, a London council warned around 100,000 households to be on guard for follow-up scams. It’s a powerful reminder that the damage from a breach doesn’t end when systems are restored — stolen data fuels fraud for months afterwards.
What it means for you
Once personal details are out, criminals use them to craft believable scams — posing as the council, the bank or a delivery firm. Public-sector bodies holding citizen data carry a particular duty of care here.
For any organisation, breach preparation should include a communications plan: how you’ll warn affected people quickly and clearly, and how you’ll help them stay safe. We build that step into the incident-response plans we create with clients.
Why the damage outlasts the breach
Restoring systems is only half the story. Once personal details are stolen, they circulate for months and fuel a second wave of fraud that can be more damaging than the original attack. Criminals use real names, addresses and reference numbers to pose convincingly as the council, a bank or a delivery firm, and because the details are genuine the scams are far harder to spot. Organisations that hold citizen or customer data carry a particular duty of care to warn the people affected before that second wave hits.
Preparing for the aftermath
Breach preparation should therefore include a communications plan, not just a technical recovery plan: how you will identify and warn affected people quickly and clearly, what practical guidance you will give them, and how you will monitor for lookalike domains and impersonation. Where personal data is involved there are also regulatory duties, such as notifying the ICO within the required timeframe. For individuals on the receiving end, the rule is simple — treat unexpected contact with suspicion and verify through official channels you find independently. We build this aftermath step into the incident-response plans we create with clients.
Source: ITPro, 8 January 2026.