Where it is difficult for people to preform their jury service, due to impending exams. a pre-booked holiday, pregnant or a hospital appointment, they may ask for their period of service to be deferred to a later date within the next 12 months. Only in extreme circumstances, should a person be excused from jury service e.g. if they've performed jury service in the past 2 years, served on a distressing case (Soham Murders Trial) or are full-time members of the armed forces.