Standing for election as a Whig in Preston in
1826, Wood was elected alongside
Edward Smith-Stanley (the future Earl of Derby and three-time prime minister), defeating the Radical
William Cobbett and the anti-Catholic candidate Robert Smith Barrie. Wood consistently supported the Whig/Radical opposition, effectively led by
Joseph Hume. As a dissenter, he supported religious liberty, advocating repeal of the
Test Acts in 1827 and 1828, and supporting Catholic emancipation, which passed as the
Roman Catholic Relief Act 1829. In the
1830 Wood and Smith-Stanley overcame a challenge by the Radical
Henry Hunt, but in the by-election following Smith-Stanley's appointment as
Chief Secretary for Ireland (in which only Smith-Stanley's seat, not Wood's, was contested), Hunt defeated Smith-Stanley. Wood and Hunt were re-elected unopposed in
1831. Wood stood down at the election of
1832. ==Later career==