Group Action

Find out more about making a group action claim with
Keller Lenkner UK – Expert Data Protection Lawyers.

Group action GDPR, cybercrime and data breach claims

When it comes to winning cases against big players, understanding the law is only half the battle. You also need experience.

At Keller Lenkner UK, our expert data protection lawyers have the legal expertise necessary to take on corporate giants and large organisations.

And, in addition to our own legal know-how, where required, we also work with expert barristers to help us win our group action cases. So, we are confident that our team will get the results you deserve.


*Find out more about no-win, no-fee, and what you will pay if you win.

There is strength in our numbers

A combined experience of over 50 years
The amount you’ll pay if we don’t win your case
Group action data violation claims we are currently pursuing
UK offices. In London, Birmingham & Liverpool

Why join a group action to claim data breach compensation?

Hold organisations to account for failing to protect your private information.


Receive financial compensation for your losses.


Force organisations to implement better data security & processes.

Our Group Actions

Data Breach Hexagons


In February 2022, nine months after the security breach, Ardagh wrote to employees to warn them that their personal information might have been exposed in the attack.

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In 2020, over 100 educational, charitable, and third-sector organisations had their data stolen following a breach at Blackbaud.

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Dixons Carphone


The Dixons Carphone Warehouse data breach resulted in 10 million customer records being accessed from Currys PC World and Dixons Travel stores.

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If a private parking company has sent you an invalid PCN, or if the DVLA has given a parking company your personal information in error, you could be due compensation.

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Easyjet data breach


In 2020, EasyJet admitted that, as well as the personal details of nine million customers, over 2,000 passengers had their credit card details accessed by hackers.

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In 2017, poor security processes at Equifax led to a huge data breach. The ICO has since fined Equifax £500,000 and people who have been affected by the breach can register to make a compensation claim.

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equiniti police


In August 2019, over 750 annual benefit statements were sent to the wrong postal addresses. These statements were for police officers of Sussex Police.
Equiniti, a company that provides support, communications and technology platforms to help manage company pensions, was responsible for distributing these statements.

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Greater Manchester Police

The personal details of victims of crime in Greater Manchester have been put online by mistake.

The data breach affects victims of sexual abuse, witnesses and people reporting crime. According to the Force, no informant details were breached.

Thousands of people are thought to be affected.

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Jargon Buster


In February 2022, Greencore wrote to employees to warn them that their personal information might have been exposed. The stolen information relates to current and former Greencore employees

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Hammersmith Medicines Research

The Maze ransomware group attacked the computer systems of Hammersmith Medicines Research (HMR) – a company which performs early clinical trials of drugs and vaccines. The criminal group had previously promised not to attack medical organisations during the coronavirus outbreak.

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Labour Party Data Breach

Labour Party

The Labour Party has experienced a data breach. Keller Lenkner UK can help victims to claim compensation for this data protection failure.

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Linkedin editorial


LinkedIn has suffered a massive data breach affecting 700 million people. In total, 92% of LinkedIn users are reportedly affected by this breach. The stolen data includes salary information.

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National Trust

National Trust

The National Trust has issued a data breach alert after a cyberattack on cloud computing company Blackbaud. Blackbaud provides software to the National Trust. The National Trust confirmed that data about its volunteering and fundraising communities has been compromised. Its 5.6 million members are not though to be at risk.

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Parasol Group

In January 2022, Parasol Group shut down some of its systems after it discovered “malicious activity” on its network.

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Police Federation

In 2019, The Police Federation of England and Wales (PFEW) suffered a severe data breach following a ransomware cyber-attack hit the PFEW headquarters. Around 120,000 current and former officers are affected.

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Simplify Group

Home movers across the UK were left unable to exchange, complete or move home due to a severe cyber failure. The incident happened when Simplify Group, a company that provides conveyancing services to several leading agencies, experienced a ‘major security breach’.

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t mobile


In November 2019, T-Mobile suffered a severe data breach. Over a million pre-paid customers are believed to be affected. T-Mobile was very unforthcoming about the data hack and did not provide additional information at the time of the breach.

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Transform Hospital Group

In December 2020, UK cosmetic surgery provider Transform Hospital Group Ltd., also known as The Hospital Group, admitted that it had been hit by a ransomware data security attack. This incident resulted in the theft of extremely sensitive customer data.

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University students sit chatting in a library


Several UK universities are involved in a global privacy violation. This university data breach occurred when Blackbaud – a firm that provides education administration, fundraising, and financial management software – was targeted by cybercriminals.

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Vision Direct header

Vision Direct

In January 2022, customers of Vision Direct were informed that their financial information might have been compromised in a data security incident.

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Zoosk Dating


In May 2020, dating website and app Zoosk was the subject of a cyber-attack. The incident, which was carried out by hacking group ShinyHunters, resulted in the exfiltration of 30 million user records with approximately 85% of the platform’s community affected.

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Why use Keller Lenkner UK to make a claim?

We are one of the most experienced multi-claimant law firms in the UK.

We represent clients in group actions and individual cases with innovation, resources, and expertise.

We work with expert barristers to ensure you get the very best level of legal support available.

We have all the resources and global expertise necessary to take on complicated cases and win.

We have offices in Chancery Lane London, Birmingham and Liverpool, and the technology to provide a nationwide service, so we can help clients across England & Wales.

We use technology to deliver a better legal experience to our clients.

We work on a no-win, no-fee basis.

We make the process straightforward and hassle-free.

What can you claim for?

While each case is judged on its own merits, there are some things we would typically look for when it comes to when claiming compensation following a data breach, cybercrime or other GDPR violation:

Financial loses

With stolen data, cybercriminals can make purchases using your bank and credit cards, apply for credit in your name, set up fraudulent bank accounts and access your existing online accounts.


GDPR failures, cybercrime and data breaches can have a significant impact on you, both mentally and physically. They can cause or exacerbate anxiety, stress and other psychological conditions.

Loss of privacy

Your data has value, and organisations must be held to account if they fail to protect your right to data privacy or otherwise do not uphold your GDPR rights.

Latest news


Contact us today for a free initial assessment of your case. Our expert, friendly team will advise you on whether you have a valid claim and will be pleased to answer any questions you might have.