and Kerr fired the second torpedo. The first one failed to explode but as they turned away the second torpedo hit the target and there was a large explosion. After this attack the Austrians took defensive action to reduce the risk to their ships by installing protective booms. Kerr was awarded the Distinguished Service Order for the "enterprise being boldly and skillfully conducted". Later he was awarded the Serbian medals Order of Kara-George, with swords (4th class) and Order of the White Eagle (4th class). In 1917 the British Prize Court found that the crew of the picket boat were entitled to a total of £405 for the sinking of the monitor. When the Austrian offensive started in October 1915 the picket boat was destroyed at its mooring by Austrian shell fire. Kerr was ordered to evacuate from Belgrade and report to Torlak. Two of the British 4.7 inch guns had been destroyed during an exchange of fire, but the remaining six were still serviceable. Kerr was instructed by Troubridge to place himself and these guns at the disposal of the Serbian command. Orders came to move the guns to Nish to help combat the Bulgarian incursion into Serbia. They used the guns in an attempt to slow the Bulgarian advance over the Morava River, but another two guns were lost during this action. The remaining four were ordered to withdrawn further west to Mitrovica, via Prokuplje, Zuršumlija and Prishtina. The journey took seven days, slowed by the congestion of retreating Serbian troops, the blizzards and the exhaustion of oxen and men. When they arrived at Prishtina the situation was such that Kerr was told to use his judgement in regard to the future of the guns. He referred to Troubridge who approved the movement of the guns west to Petch (Peć). After setting out on the 22 November one of the guns sunk into a swamp on the road. The combined effort of oxen, lorries and men could not shift it, so eventually it had to be wrecked and within a few hours a second gun suffered a similar fate. On 26 November a third gun was lost when it fell through a bridge and had to be wrecked. The final gun was destroyed on the 28 November and all remaining ammunition buried. With the loss of the guns, and the Serbian army in retreat, Kerr’s priority was to