PREMIER League stars are among 400,000 wealthy customers whose personal details may have been stolen in a major digital heist targeting a high-class diamond merchant.

Hackers claim to have accessed the home addresses and ring purchase details of hundreds of thousands high-net-worth individuals following a cyber-attack on a Mayfair jeweller.

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The Met Police cyber crime unit has launched an investigation into the possible breach at 77 Diamonds, a firm famed for catering to top-flight footballers and TV celebrities.

Elite sports figures form a key part of the clientele using the luxury London firm for bespoke engagement and wedding bands.

The stolen data allegedly includes home addresses, billing information, and exact valuations of diamond rings bought by high-profile buyers.

Hackers appear to have offered the confidential database for auction on the dark web, raising immediate security fears for the firm’s elite customer base.

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The Mayfair specialist produces bespoke jewellery tailored to client demands, with individual pieces fetching anywhere from a few thousand pounds to upwards of £1 million.

Specialist craftsmen and apprentices at the boutique produce around ten complex bespoke pieces each day for their exclusive clientele.

Following the breach, the company immediately instructed external cybersecurity advisers to investigate the full extent of the incident.

Meanwhile, high-profile clients – including top football stars – have been advised to heighten their personal security precautions while the investigation proceeds.

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Official notifications have also been sent to the Information Commissioner’s Office as experts scramble to trace the network intrusion.

In the wake of the intrusion, 77 Diamonds managing director Tobias Kormind issued an urgent email warning to individuals who have bought from the firm over the past 11 years.

“We are investigating a possible unauthorised access to, and misuse of, a customer database and have taken immediate steps to secure our systems,” Kormind told The Times.

The executive confirmed that the stolen data potentially includes names, email addresses, physical postal addresses, and complete purchase histories.

“At this stage, we cannot confirm whether your personal information specifically was accessed,” he admitted to affected clients.

“We are contacting you now so that you can take appropriate precautions while our investigation continues.”

Despite the exposure of high-value client records, the firm confirmed that it does not hold or store customer banking details on the targeted server.

Kormind confirmed that no individual clients have yet reported being directly targeted or harassed by extortionists following the leak.

Internal cybersecurity specialists who analysed a sample of the compromised data noted that the specific test batch did not contain residential addresses.

However, police inquiries and internal forensic evaluations remain ongoing as experts attempt to verify the full scope of the breach.

Cops from the specialist cyber unit continue to monitor dark web marketplaces for signs of the stolen data being traded.

The high-profile hack comes amidst a sharp rise in corporate digital crime across the country.

The Cyber Breaches Survey from the Department for Science, Innovation and Technology revealed in April last year that 43 per cent of UK businesses suffered a cyberattack over a 12-month period.

Independent government estimates calculate that digital criminal activity now costs the UK economy roughly £14.7 billion every year.

Security officials warn that the cyber threat stems from a combination of state-sponsored groups and financially motivated organised syndicates.

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Foreign actors backed by states such as Russia, Iran, and North Korea actively target UK infrastructure and commercial entities.

Financially driven cartels include entities like the Russian group Conti, whose leaked internal records exposed a corporate-style setup complete with management structures, departmental budgets, and HR teams.