The envelope is unmistakably official and the first reaction is usually logistical panic. Jury service summons around 180,000 people a year in England and Wales, selected at random from the electoral register, and because most people serve at most once or twice in a lifetime, the process remains widely unknown until it is personal.

The legal position first: service is compulsory. Ignoring a summons risks a fine, and eligibility is broad, ages eighteen to seventy-five, registered to vote, resident for five years, with disqualifications for certain convictions and for some roles connected to justice. What the system does allow, generously in practice, is deferral: anyone with a genuine conflict, booked holidays, exams, medical treatment, a work crisis, can ask to move their service to a date within the following twelve months. Outright excusal is rarer and reserved for stronger grounds. The practical advice from anyone who has served is to engage with the form immediately rather than hoping the fortnight improves.

Money is the next surprise. Jurors are not paid a wage. Employers must release staff but need not pay them, and the court reimburses travel, a subsistence amount, and loss of earnings only up to daily caps that fall well short of many salaries, a structure that has drawn long-running criticism for the burden it places on the self-employed. Checking an employer's jury-pay policy early, and warning clients if freelance, belongs on the first-day checklist.

The service itself is dominated by an unadvertised activity: waiting. A summons is to a pool, not a trial. Panels are drawn from the assembly room as courts need them, with final selection by random ballot in the courtroom, so a fortnight can contain two trials, one, or none at all, and books are the veterans' recommendation. Once sworn, jurors decide facts alone; the judge directs on law, and questions can be passed forward in writing.

The rules with teeth

Two prohibitions carry criminal penalties and outlast the trial permanently. Jurors must not research the case, the defendant, the locations or the law online or anywhere else, because verdicts must rest only on evidence heard in court, and people have gone to prison for a curious evening's googling. And what is said in the deliberation room is secret forever: revealing it, to family, to journalists, on social media, decades later, remains an offence.

For all the inconvenience, the consistent report from former jurors is that the experience lands as something close to civic surprise: twelve strangers, taking a stranger's fate seriously. The system's legitimacy rests on exactly that ordinariness, which is why it conscripts rather than recruits.

Jury service: what actually happens when the summons arrives
Photo: Douglas Muth from Philadelphia, PA, USA / Wikimedia Commons (CC BY-SA 2.0)