“Lorries are vital for the transport of almost everything in Europe,” says Raluca Marian of the International Road Transport Union (IRU) in Brussels. Three-quarters of all goods in the EU travel by lorry. If half the bloc’s 6.2m heavy-duty vehicles (HDVs) cannot function, supermarket shelves will be empty within days and essential services reliant on ambulances and fire engines will break down. That could happen if stocks of AdBlue, a…