The majority of the 39 people found dead in the back of a truck near London were likely from Vietnam, a community leader from the rural, rice-growing community, where many of the victims are believed to have come from said on Saturday.The discovery of the bodies – 38 adults and one teenager – was made on Wednesday after emergency services were alerted to people in a truck container on an industrial site in Grays, Essex.Police have said they believe the dead were Chinese but Beijing said the…