One of the Long Toms at Ladysmith was taken forward for use during the Battle of Vaal Krantz. Prior to 5 February 1900 an emplacement had been prepared for it on a hill called "Doringkop" (Thorn Hill). The gun arrived at Vaal Krantz on 5 February, but could not be placed on the hill because one of its wheels had broken and the hill was too steep anyway. The Boers managed to get it to the top that night. It started firing at 05:15 the next morning. British return fire only managed to destroy one of its ammunition wagons, but the setback was temporary.