Earl of Londonderry extinct on the death of his great-grandson, the fourth Earl, in 1714. The second creation came in 1726 in favour of the soldier and politician Thomas Pitt, 1st Baron Londonderry. He had already been created Baron Londonderry in 1719 and was made Viscount Gallen-Ridgeway at the same time as he was granted the earldom, also in the Peerage of Ireland. He was the husband of Lady Frances Ridgeway, daughter and heiress of the fourth Earl of the first creation. A member of the prominent Pitt family, he was the uncle of William Pitt, 1st Earl of Chatham. His younger son,
William Pitt, 1st Earl of Chatham a great deal of public support. For example, in view of his probable accession to power, preparations were made in the City of London for a banquet and a general illumination to celebrate the event, but the celebration was at once countermanded when it was known that he had become Earl of Chatham. Edmund Burke described the "chequered and speckled" administration with great humour, speaking of it as "patriots and courtiers, King's friends and republicans; Whigs and Tories ... indeed a very curious show, but utterly unsafe to touch and unsure to stand on". The problems facing the government included