Wallop was the third son of John Wallop, of Farleigh Wallop and his wife Alicia, daughter of William Borlase. The Wallops were an old and influential Hampshire family; his great-grandfather was the regicide Robert Wallop. His father died about 1694, and he succeeded an elder brother, Bluett Wallop, in the family estates in 1707. Wallop was educated at Eton in 1708, in Geneva from 1708 to 1709, and took his Grand Tour through Italy and Germany in 1710.
Political career
In 1715, Wallop was returned as a WhigMember of Parliament for both Andover, where a family interest existed, and Hampshire, choosing to sit for the latter. In 1717, he took the side of Stanhope and Sunderland over Walpole and Townshend and was rewarded with appointment as a junior Lord of the Treasury. He was re-elected without opposition at the ensuing by-election in Hampshire. However, he voted against the Government on the repeal of the Occasional Conformity and Schism Acts. When Sunderland fell in 1720 after the South Sea Bubble, Wallop was put out of the Treasury. He was compensated with a peerage, being created Viscount Lymington and Baron Wallop on 11 June 1720. In 1731, he suggested to Queen Caroline that he should replace the Duke of Bolton as the Government's electoral manager in Hampshire, but nothing immediately came of this. On 11 January 1732 he was appointed Justice in Eyre for the forests north of Trent. In 1733, when the Duke of Bolton broke with Walpole over the proposed Excise Bill, he was stripped of most of his offices; Lymington succeeded him as Lord Lieutenant of Hampshire, Vice-Admiral of Hampshire, and Vice-Admiral of the Isle of Wight. In July 1734, the Duke of Montagu, who had succeeded Bolton as Governor of the Isle of Wight, resigned that office and Lymington received it as well, although he resigned office as Justice in Eyre that year. The disaffection of Bolton threatened the Whig interest in Hampshire. Lymington worked in "perfect harmony" with Lord Harry Powlett, Bolton's brother and one of the Whig candidates, but Bolton's opposition to Anthony Chute, the other Whig, resulted in the defeat of Chute and the victory of one of the Tory candidates, Edward Lisle. Upon Walpole's fall in 1742, the Duke of Bolton regained all of his prior offices in Hampshire and the Isle of Wight, to Lymington's loss. As in 1720, Lymington was compensated with a peerage, and was created Earl of Portsmouth on 11 October 1743. He regained the offices of Governor and Vice-Admiral of the Isle of Wight in 1746, when Bolton supported the abortive ministry of Bath and Granville and was deprived of those posts by the Pelhams.
