Thirteen, perhaps fourteen, years old, they crossed the street to speak with us. One with long, deep dark hair, the other fair-haired, with braces on her teeth. They asked the way to Lidl. Their accents betrayed them as Spanish, presumably on a school visit or exchange.

Asking directions to Lidl at 9.30 on a Saturday night seemed odd. “What do you need to buy?”

“We do not need to buy anything, we are to meet some friends there, in the car park.”

“Which branch of Lidl? There are two.”

“It …