British soldier court-martialed after ignoring SIM card order in Estonia

A British soldier, Daniel Barton-Kennedy, was court-martialed after he ignored an order to remove his phone SIM card before deploying to Estonia, where his phone was hacked and nude photos were used to blackmail him. The corporal, who served in the 1st Battalion of the Duke of Lancaster Regiment, pled guilty and received 10 months in detention plus a reduction in rank. His appeal was denied in August 2026.

Deployment and security order

In January 2026, Barton-Kennedy's unit was deployed to Tapa, Estonia, for Exercise Eastern Warrior, roughly halfway between Tallinn and the Estonia-Russia border and about 90 miles west of the Russian border. On January 7, while still in the United Kingdom, he and other members of his unit were briefed and told to remove SIM cards, switch off location settings, and use a trusted virtual private network on personal electronic devices. After arriving in Estonia, they received further briefings and reminders of the policy. Despite those instructions, Barton-Kennedy did not remove his SIM card.

Blackmail and report

On January 19, he told his platoon commander that an unknown party had obtained nude photographs from the photo section of his mobile phone and had identified him on social media. He initially agreed to pay 100 British pounds, about $133, but refused when the demand rose to 250 British pounds, about $333. He then informed his platoon commander of what had happened.

Court martial and appeal

Barton-Kennedy, who had more than seven years of service, was court-martialed and pled guilty at a hearing on July 30. He told the court he understood the orders but asked it to consider his personal circumstances, saying that without his phone he could not reach his daughter on her birthday or his pregnant partner. In a written statement, he said he was stunned by the first blackmail message, recognized a duty to report the compromise without further delay, deeply regretted the incident, and said serving in the British Army had been one of the greatest privileges of his life. He was reduced in rank and ordered to serve 10 months in detention. His appeal was denied in August 2026.

Army response

Lt. Col. EP Mackie, a British Army spokesperson, said security measures are meant to protect the safety of military personnel. He said breaches of Army security measures that might compromise personal safeguarding or operational security will be dealt with swiftly and that offending personnel can expect uncompromising disciplinary action. The case was first reported by the Estonian newspaper Eesti Ekspress, and a 21-page British appeals court document was shared with Ars Technica.

Sources: Ars Technica