Despite UK sanctions on Russian oil tankers, dozens have traversed the English Channel, evading legal actions. The UK government received assurances to detain these vessels, yet 42 sanctioned tankers were tracked passing through. Analysts highlight the shadow fleet's role in mitigating the impact of sanctions on Russia's economy. Calls for more assertive actions against these tankers have been made, but independent UK interventions remain lacking. The shadow fleet's operations continue to pose challenges for monitoring and enforcement.