One of the United Kingdom’s largest oil refineries has extended a loan facility with the arm of an oil company founded and part-owned by a sanctioned Russian oligarch, the Guardian reported on Jan. 2. Recently filed accounts reveal that oil refinery owner Essar Oil UK extended a $500m “payment facility” to Litasco, the oil trading division of Moscow-based Lukoil. The agreement effectively comes into force as a line of credit allowing Essar to buy fuel and pay later. Litasco is wholly owned by Lukoil, whose founder, Russian oligarch Vagit Alekperov, was placed under sanctions by the UK in April…