Twice a day Monday to Friday (I think), at midday and fifteen minutes later at precisely 12.15 the peace and quiet of the Contades district of Strasbourg is shattered by the sound of an almighty air-raid siren. Well, it obviously can’t be an ‘air-raid’ siren, because there aren’t any air-raids, but it is a siren nonetheless. Loud and brutal.

The question is : where is this noise coming from, and why? Is it the official lunchtime toll? Is it a pigeon scarer? I need some help here. Can anyone solve the great air-raid siren mystery of Strasbourg?