Campbell’s Blythswood estate bordered on Glasgow, and by the 1820s some of his land was being ‘profitably feued out for the construction of fashionable residences’ for the town’s wealthier inhabitants.
He cast no recorded votes in the first two sessions of the 1820 Parliament, being granted six weeks’ leave on account of ill health, 30 May 1820, and pairing against Catholic relief, 28 Feb. 1821. Thereafter, he was a regular attender who continued to give general support to Lord Liverpool’s ministry. He divided against more extensive tax reductions, 21 Feb., abolition of one of the joint-postmasterships, 13 Mar., and repeal of the salt duty, 28 June 1822. However, he voted against the government’s proposed new corn duties, 9 May, and presented a hostile petition from Glasgow chamber of commerce, 21 May.
In the 1826 Parliament Campbell served more frequently on committees, usually dealing with Scottish matters. He presented petitions from Paisley for revision of the corn laws, 26 Feb., and Glasgow for protection of the shipping interest, 2 Apr. 1827.
The ministry regarded him as one of their ‘friends’, and he voted with them in the crucial civil list division, 15 Nov. 1830. He presented a Paisley petition against the truck system, 14 Dec. 1830. He was granted a week’s leave for urgent private business, 14 Feb. 1831. He asked Lord Grey’s ministry to allow a six-month drawback period for printed calico, which would be ‘a boon’ to his constituents and ‘very beneficial to the trade in general’, 28 Feb. He joined a deputation of Scottish Members to the chancellor of the exchequer, Lord Althorp, against the proposed tax on steam vessels, 5 Mar.
