As the U.S. relaxes some Russian sanctions to ease oil flows, the U.K. government has published a new Strategic Approach to Sanctions Enforcement, indicating that it does not intend to relax its focus on prosecuting sanctions breaches. EU leaders also pushed back on the U.S. temporary lifting of some sanctions, indicating that they would not follow suit. 

Ruth Prickett graduated from Cambridge University with a BA hons in History and has specialized in business and finance journalism for the past 20 years. She was editor of Financial Management, the magazine...