Wilbraham, a Tory, was returned for Appleby on the interest of his kinsman Lord Thanet, and for Newton on that of Peter Legh, also his kinsman.
Under George III he drew closer to the court, and appears in Fox’s list of Members in favour of the peace preliminaries, December 1762. He took a prominent part in the debates of 1763-4 on general warrants. When the King’s message about Wilkes was discussed, 23 Nov. 1763, Wilbraham spoke for postponing its consideration until Wilkes could be present; and the court’s majority sank to 77 on a division of 409. ‘Wilbraham’s opinion and that of C. Yorke had great influence in this division’, wrote James Harris; and Grenville informed the King that ‘the authority of Mr. Wilbraham weighed so much with several gentlemen of the law that Mr. Forrester, Mr. Eliab Harvey, and Mr. Yorke supported the proposition for putting off the consideration’.
‘His great industry and abilities carried him to the highest reputation and practice in his profession, which he adorned with sound knowledge, clear judgment, and steady integrity.’
He died 3 Dec. 1770, aged 76. Chief Justice Wilmot wrote to one of his sons on 25 Feb. 1771 that Wilbraham ‘has not left a better lawyer, or an honester man, behind him’.
