I’m afraid there’s nothing new about staff shortages causing night closures. Last year and this there have been several instances of Luton/Stansted and Gatwick having to close for mandatory breaks due to shortages,mainly sickness related but also due on occasion to extremely ill advised rostering decisions made to cover day shift shortages. These have not been missed by various of the operators and airport authorities affected but have (very fortunately for those who make those decisions) not made it to a wider media audience.