Admiral of the Fleet Sir John Edmund Commerell, was a Royal Navy officer. As a junior officer, he was present at the Battle of Vuelta de Obligado in November 1845 during the Uruguayan Civil War. He also took part in operations in Sea of Azov during the Crimean War and went ashore with the quartermaster and a seaman, to destroy large quantities of enemy forage on the shore. After a difficult and dangerous journey they reached their objective – a magazine of corn – and managed to ignite the stacks, but the guards were alerted and immediately opened fire and gave chase. The men had difficulty in escaping, but they finally reached their ship and the lookouts later reported that the forage store had burned to the ground. He and his colleague, Quartermaster William Thomas Rickard, were awarded the Victoria Cross, the highest award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces.

The Commander-in-Chief, Portsmouth, was a senior commander of the Royal Navy for hundreds of years. The commanders-in-chief were based at premises in High Street, Portsmouth from the 1790s until the end of Sir Thomas Williams's tenure, his successor, Sir Philip Durham, being the first to move into Admiralty House at the Royal Navy Dockyard, where subsequent holders of the office were based until 1969. Prior to World War I the officer holder was sometimes referred to in official dispatches as the Commander-in-Chief, Spithead.