A British legal charity expressed concern Friday after a report that the trial of a pregnant British woman jailed in Laos would be delayed. The Vientiane Times, an English-language newspaper in Laos, reported Friday that the case of Samantha Orobator “needs further investigation to prove how she became pregnant while in prison before the case can come to court.” Orobator, 20, was jailed last August at the Vientiane airport for allegedly carrying about half a kilogram of heroin. She is more than five months pregnant, and legal aid charity Reprieve — which has worked on her case — has said that is possibly the result of rape while in prison, perhaps by a guard