From a junior branch of the Bertie family which had inherited estates at Weston-on-the-Green in Oxfordshire, he represented that county in Parliament from 1743 until standing down before the bitterly contested 1754 election.
[1] The estates included the manors of Weston-on-the Green in Oxfordshire,[2] Yattendon,[3] Hampstead Norreys, and Bothampstead in Berkshire.
[7] Bertie and the opposition Whig John Bance were both defeated by the Government candidates, Joseph Townshend and Hon.
He sat in opposition to the Carteret and Pelham ministries, and in the debate in January 1744, spoke for the recall and disbanding of the British troops in Flanders.
[1] At the 1747 election, he was returned unopposed in Oxfordshire,[9] and for unknown reasons received a single vote at Westbury (where the Abingdon interest backed Bance and the Tory Paul Methuen).