Compared with Portugal's other current problems, the one in Sintra today turned out to be easily solved, though somewhat embarrassing.
On the second day of their visit to Portugal, the Prince of Wales and Duchess of Cornwall were supposed to plant two roses in the magnificent rose garden at the Palace of Montserrat. For security reasons, this plan was adjusted and they just planted roses in a couple of pots next to the palace.
Diário de Notícias reports that as they were about to leave amid tight security, it became apparent that the car key had been locked inside the royal limousine. This caused great mirth among the 200 or so guests present. Charles and Camilla had to leave the palace in another car.
No doubt Lord Byron, who famously referred to Sintra as "glorious Eden", would also have been amused.