A British national has been arrested by Ukrainian security forces on allegations of espionage for Russia, according to the Kyiv Prosecutor’s Office. The unnamed individual, who entered Ukraine in January 2024, initially served as a military instructor in Mykolaiv, a city close to the southern front lines. Later, he was employed by Ukrainian border units. Prosecutors claim that the man ceased his instructional duties in September 2024 and relocated to Odesa, where he allegedly established contact with a Russian intelligence operative, agreeing to exchange military intelligence for financial compensation. Evidence presented by Ukrainian authorities indicates that in May 2025, the Briton transmitted sensitive information, including the locations of Ukrainian military units, photographs of training facilities, and personal data of military personnel. Additionally, he is accused of attempting to access military units, gathering intelligence on Odesa’s infrastructure, and discussing the potential use of explosive devices. For one of these tasks, he reportedly received $6,000. The Security Service of Ukraine (SBU) further alleges that the man was preparing to carry out terrorist attacks and had advertised his espionage services in pro-Kremlin online groups. He was detained at his temporary residence in Kyiv and is currently held without bail as the pre-trial investigation continues. If convicted, he could face up to 12 years in prison. The British Foreign Office has been approached for comment.