Pocklington's career in England reached its low point in 1713, when he lost both his seat in Parliament and his place on the Bench, but a new career opened up for him in 1714. On the death of Queen Anne her Irish judges were dismissed en bloc for their adherence to the Tory party. Yet suitable replacements for judicial office were not easy to find in Ireland : "God help the country!" was the reaction to the appointment of one of the new Irish-born judges. The promotion of English Whig lawyers to the Irish Bench was the obvious alternative, and Pocklington agreed to serve: he was soon joined as Chief Baron of the Irish Exchequer by an old friend, Sir Jeffrey Gilbert. Both men became popular in Ireland and their first years in the country were described as "halcyon".
''Sherlock v Annesley''
Pocklington's contentment with his life in Ireland was shattered when a seemingly routine lawsuit, Sherlock v Annesley, where two cousins disputed the right to the possession of certain lands in County Kildare, created a major crisis in Government: in Pocklington's own memorable phrase: "a flame burst forth and the country's last resentment fell upon us". By bringing separate appeals to the Irish and the British House of Lords, the litigants reopened an old dispute as to which House was the final court of appeal for Ireland. The two Houses issued contradictory orders to the Barons of the Irish Exchequer – Gilbert, Pocklington and Sir John St Leger – who chose to implement the British decree. They were summoned by the Irish House of Lords to explain their conduct, and after an impassioned hearing they were committed to the custody of Black Rod for contempt. Pocklington, who has been described as "something of a prig", with a habit of irritating his listeners by delivering pompous lectures, is unlikely to have have made a good impression on the Lords. He was in custody for three months, which may have been the cause of his later ill health. The British Parliament responded by passing the Declaratory Act of 1719, removing the Irish House of Lords' right to hear judicial appeals: this inflamed the public mood of anger and bitterness even further, and Pocklington and his colleagues were viciously insulted.
Later life
After regaining his freedom Pocklington might well have been expected to return to England, as Sir Jeffrey Gilbert soon did: but he was happy to continue living in Ireland, where he had bought an estate near Celbridge. He lobbied unsuccessfully to become Chief Justice of the Irish Common Pleas in 1720. He made occasional visits to England, but his health was failing. He felt well enough to go on the Munsterassize in 1724, but suffered a "paralytic seizure" at Limerick, and the following year he was confined to his house for several months. In July 1731 his name appears as one of the trustees of the King's Inns.
Death and legacy
Pocklington died on 22 October 1731 and was buried in Finglas. By his wife Mary he had one son, Christopher, who became an Admiral in the Irish Navy. Christopher married Elizabeth, daughter of Sir Thomas Domvile, and heiress of the Domvile baronets of Templeogue. Their descendants, who took the Domvile name, inherited the substantial Domvile estates in south County Dublin, and were later made the Domvile baronets of the second creation.