On 24 January 1915 the first clash of battle cruisers took place off the Dogger Bank, in the middle of the North Sea. This was a badly conducted battle on the British part which resulted in the German armoured cruiser SMS Blücher being sunk and HMS Lion being badly damaged.
On the afternoon of 23 January 1915 the Admiralty code breakers deciphered German signals which indicated a sortie by the battle cruiser squadron. Admiral Sir David Beatty, commander of the British Battle Cruiser Force was ordered to sea to intercept the German force. The British were formed into two squadrons, the first comprising HM Ships Lion, Tiger and Princess Royal and the second of HM Ships New Zealand and Indomitable. Supporting this force were the First Light Cruiser Squadron from Dover and the Harwich Force of Light cruisers and destroyers. The German squadron comprised SM Ships Derfflinger, Moltke, Seydlitz and Blücher and was also supported by cruisers and destroyers.
At about 7.20am, while it was still dark the cruisers HMS Aurora made contact with the German cruisers and opened the engagement. As it became light Admiral Beatty was able to make out the German force in the distance, but was not in a position to cut off The German retreat towards the east. Thus the engagement turned into a stern chase. The advantage was with the British were able to make about 28 knots, while the Germans 27, but only 23 knots in the case of Blücher. Additionally Admiral Hipper in command of the German force, had been informed that the British were the 2nd Battle Squadron, over which he had a significant speed advantage.
As the British ships closed the range Admiral Beatty ordered 24 knots, then 25 and then 26 knots and finally 29 knots, although no ship actually achieved that. Just before 9.00am Lion tried a ranging shot at 20,000 yards and soon had the range and commenced sporadic firing one gun at a time. By 9.30am the order was given for ships to engage their opposite numbers. The intention was for the leading four ships to engage the four Germans, leaving Indomitable which was lagging behind, to join in later. However, standard practice when there were more ships present that in the enemy line was for the second ship to engage the leading ship also. This resulted in Moltke being unmolested.
Nevertheless the battle was going well for the British and it seemed that all the German ships would be sunk.
Lion was hit 15 times by heavy shells, including two simultaneously by Defflinger, one of which put the condenser out of action. This was a crucial hit because without the condenser being operational, water could not be feed to the boilers and eventually the ship would have to stop. Nevertheless the battle was going well for the British and it seemed that all the German ships would be sunk. Blücher was badly damaged and clearly doomed and Seydlitz had received serious damage, but was still in the line. At this time a submarine periscope was reported and Admiral Beatty later said that he personally saw it. This resulted in him ordering a 90º turn away from the Germans, which was standard procedure. However this open the range and the Germans drew away. Lion was by now stopped, without electric power and had all but two signal halyards shot away. Admiral Beatty then signalled “Course North East”, followed by another to “Attack the rear of the enemy”. Unfortunately these were both made effective together, thereby giving the meaning “Attack the rear of the enemy to the North East”. Acting on this, his second in command, Admiral Moore, took the remaining four battle cruisers and attacked the poor Blücher which was already sinking.
Beatty transferred his flag to Princess Royal, but it was too late to resume the chase and Admiral Hipper made port safely.