HMS Onslow (1916) 15 February 1916 and completed in April 1916. Her first commander was John Tovey, (later Admiral of the Fleet). On 24 April 1916, the Easter Rising against British rule broke out in Ireland. As a response, two Infantry Brigades were ordered from Liverpool to Dublin to reinforce the British forces, with "Onslow" escorting the transports carrying these troops. She saw action at the Battle of Jutland, where "Onslow" was badly damaged, with her speed reduced to . Nevertheless, Tovey pressed home the attack against first a cruiser and then a line of battlecruisers. "Onslow" was brought back to Aberdeen despite
John Redmond after 1916 was increasingly eclipsed by ill-health, the rise of Sinn Féin and the growing dominance of Dillon within the Irish Party. June 1917 brought a severe personal blow to Redmond when his brother Willie died in action on the front at the onset of the Battle of Messines offensive in Flanders; his vacant seat in East Clare was then won in July by Éamon de Valera, the most senior surviving commandant of the Easter insurgents. It was one of three by-election gains by Sinn Féin, the small separatist party that had played no part in the Rising, but was