American Formula One team Haas will use a plain white car without advertising from Russian firm Uralkali on Friday’s concluding day of the Barcelona pre-season test. The team usually use a red-white-blue colour scheme similar to the Russian flag and Dmitry Mazepin, father of their Russian driver Nikita, is a major team backer. They announced the change late Thursday after Russia’s invasion of Ukraine. Dmitry Mazepin is an oligarch chairman of a chemical firm. The team said no further comment would be made about their decision. Formula One is also considering whether to keep the September 25 Ru…