Bangladesh, Dec. 12 -- The United Kingdom has launched one of its most expansive sanctions actions in recent years against Russian propaganda and influence networks, designating prominent ideologue Aleksandr Dugin, high-profile military blogger Mikhail Zvinchuk (better known as Rybar), and the Kremlin-linked foundation Pravfond. The move marks a significant escalation in Londons efforts to counter what officials say is a sprawling ecosystem of Russian disinformation, covert financing, and influence operations that stretch across Europe and beyond.

The new measures include full asset freezes and bans on the provision of trust services to the individuals and organizations named. British authorities described the targets as actors who promo...