Abstract: A vehicle locking system for a secure delivery van having a driver's cabin and a cargo space with respective doors has an electrically operable locking system including a selection member in the driver's cab, and a respective key operated switch at the or each cargo space door. The system immobilizes the vehicle except in one position of the selection member, and all the doors are locked when the selected member is positioned to allow the vehicle to be driven. Furthermore where the vehicle has a plurality of doors to the cargo space, only a selected such door, as selected by the selection member, may be opened. The system is designed to minimize opportunistic theft which might otherwise be permitted by the vehicle driver neglecting to lock doors.