international watchdog o.p.c. w. also had blood samples from the script piles and a police officer he was also affected tested in four different laboratories and they confirmed the conclusion of the british authorities is accurate while the report did not explicitly name novi chalk the body said the agent used was of high purity. scientists based at the british defense research laboratory important down quickly identified the substances novi chock a highly toxic agent developed in soviet russia even though the watchdogs report made no assessment as to who was behind the attempted murders the british government feels vindicated british foreign minister boris johnson issued a statement saying there was no doubt what was used and no alternative explanation as to who was responsible says it will not accept the report s conclusions as long as russian experts do not have access to the samples london is now planning to