I believe there is still a possibility of an appeal, that may be what is delaying them leaving the country. There might be a time window for the prosecution to say whether or not they will appeal. For those who don't know the history, they were two months in prison before any charges were brought, about 18 months later (some in prison, some on bail) charges were dismissed, then the prosecution appealed, they were found guilty, they appealed that and the judge has taken a year to decide on a verdict of that appeal.