I think this news item and the ensuing discussion have been blown out of proportion.
Even a perfectly fully staffed unit would struggle with a last minute double sickness for night shift.
Service provision is not delivered with unlimited resources in any fields. We've come to accept that it's normal having to wait 12 weeks for an NHS consultant appointment, but there seems to be outrage at 90 minutes of closure in the middle of the night at Gatwick as a one off event.