We useand other data for a number of reasons, such as keeping FT Sites reliable and secure,personalising content and ads, providing social media features and toanalyse how our Sites are used.Empty shelves in supermarkets are a message from a workforce that is usually invisibleA of truck drivers has led to empty shelves in British supermarkets. There is even of the army being called in to help. For those who wanted the UK to remain in the EU, it feels like a moment to say: “We told you so, Brexit was a disaster.” But that misses the point. The empty shelves are a visible message from a...…We useand other data for a number of reasons, such as keeping FT Sites reliable and secure,personalising content and ads, providing social media features and toanalyse how our Sites are used.Empty shelves in supermarkets are a message from a workforce that is usually invisibleA of truck drivers has led to empty shelves in British supermarkets. There is even of the army being called in to help. For those who wanted the UK to remain in the EU, it feels like a moment to say: “We told you so, Brexit was a disaster.” But that misses the point. The empty shelves are a visible message from a...WW…