LA LÍNEA DE LA CONCEPCIÓN – LA LÍNEA DE LA CONCEPCIÓFears of disruptions following Britain’s departure from the European Union were replaced by coronavirus-related restrictions on border traffic between Spain and Gibraltar on Monday, the first working day at the United Kingdom’s only land border with the European mainland.Only a share of essential workers from an average of 15,000 who cross the fence between Spain’s La Línea de la Concepción and the British territory on a normal day were venturing into Gibraltar, which went into lockdown late Saturday amid a surge in virus cases that is putting under pressure its limited health infrastructure.Under the new stay-at-home order, the 30,000 residents on the British speck of land on Spain’s.