The British were disappointed by their failure to sink or damage "Tirpitz". Tovey believed that the order to prioritise the defence of the convoys over attacking "Tirpitz" had hindered his operations. He was also frustrated by the Admiralty's attempts to closely manage his command during the battle. On 13 March the British Prime Minister Winston Churchill asked the First Sea Lord Admiral of the Fleet Dudley Pound to provide "a report on the air attack on TIRPITZ, explaining how it was that 12 of our machines managed to get no hits as compared to the extraordinary efficiency of the Japanese attack on PRINCE OF WALES and REPULSE". Churchill knew though that the reason was that Japanese had highly effective aircraft while the Fleet Air Arm did not. Operation Sportpalast also demonstrated the threat which the German warships in Norway posed to the Arctic convoys, leading to a decision that the Home Fleet cover all future convoys. This prevented ships being transferred from the fleet to other theatres of the war.