Accidental slide deployments during flights are rare but can happen, posing a risk to crew and passengers.
Proper arming and disarming of slides is vital for passenger safety during emergencies.
Despite incidents, flying remains the safest mode of transport, in part due to safety measures like inflatable evacuation slides.
On February 3, Flight BA886 was scheduled to depart London Heathrow (LHR) at 09:55, bound for Bucharest (OTP), when it suffered an incident. The aircraft, an Airbus A320-200 registered G-EUUB, was unable to complete the flight after the captain mistakenly activated the emergency slide while opening the door.
The Sun initially reported the incident, saying that the captain had opened the door to pass documentation to ground crew. However, other outlets have subsequently reported that the overhead bins were full, and the door was opened to pass suitcases to the crew loading bags into the hold.

Whatever the circumstances, it's a pretty grave error on the part of the pilot, and not something you'd expect a captain to get wrong. According to the Sun, the pilot has been suspended from duties for the time being.