The British national transmitted coordinates of facilities in southern Ukraine where he had personally trained recruits, giving Russia targeting data on active military infrastructure.
From: Euromaiden Press BY VIRA KRAVCHUK

Ukrainian counterintelligence (SBU) detained a British national in Kyiv who switched from training Ukrainian soldiers to spying for Russia’s security service (FSB).
The man arrived in January 2024 with firearms and tactical training credentials. He worked as an instructor for mobilized personnel in Mykolaiv, southern Ukraine, then moved to a border guard unit. Standard work for foreign volunteers with military expertise, according to Ukraine’s security service (SBU) and Prosecutor’s Office.
But by late September, he had stopped instructing. Instead, he relocated to Odesa and started advertising his services in pro-Kremlin internet groups. Russian special services made contact.
An FSB officer subsequently began assigning tasks after recruiting him, according to the investigation. The suspect passed informationabout foreign instructors in Ukraine’s defense forces with whom he had previously communicated. He also transmitted coordinates of Armed Forces training centers in southern Ukraine where he had trained mobilized personnel.
The Russians wanted more. They sent instructions for manufacturing explosives and coordinates for a weapons cache. He retrieved a pistol with two loaded magazines from the drop site. The agency describes this as preparation for terrorist attacks.
SBU counterintelligence detected the operative, documented his activities, and arrested him at his temporary residence in Kyiv.