I used to accompany the two fitters when they took new vehicles for the first ULW weighing at our local weighbridge. Before leaving the depot the lorry would be stripped of dropsides & tailboard, spare wheel & carrier, jack & wheelbrace and the passenger seat. The two 6-volt batteries would be taken out and the small 12-volt one from the boss’ car fitted. The fuel tank was drained then a half gallon oil measure-full of fuel poured back in. At the weighbridge the fiasco continued, with all the water drained from the cooling system. The vehicle was then run on to the 'bridge, while one fitter and I stood at the rear of the vehicle, out of sight of the weighman heaving upward on the lorry’s bodywork. Having got the weigh ticket, the process was reversed and we returned to the depot, presenting the boss with an official evidential weight ticket for (usually) 2T 19C 3Q. Over three tons, of course, and the vehicle would have entered the higher road tax bracket.