By 1796 electioneering was a ‘favourite passion’ of Cotterell’s. Preferred by the lord lieutenant, Lord Bateman, for the command of the county militia to Lord Malden, he also aspired to a seat for Hereford. His prospects were marred by the bungled candidature of another ministerialist John Keysall, who withdrew too late to enable him to stand a chance. The death of one of the newly elected Members revived his hopes and he canvassed with considerable success, but did not go to a poll. He was diverted to the county, for which he stood at the last minute in 1802. He had been active in the suppression of the rebellion of ’98 in Ireland, for which he was thanked by the Irish parliament and awarded the freedom of Hereford. On 25 Nov. 1801 Bateman had recommended him to the prime minister for a baronetage, through Lord Hobart, but nothing came of it then. At the poll, he ousted the Whig Robert Biddulph, whose friends proceeded to void his election for treating, which was indulged in by all the candidates. By a compromise, the chairman of Cotterell’s election committee, John Matthews, replaced him unopposed until the next election when, by now a baronet, he was returned unopposed.
Cotterell, who had just inherited more land in the county, was described at that time as ‘a man of property, but of mean conditions and parts; well disposed, however, and constitutional’.
It was never so particularly inconvenient to me to leave home as at this time, but as your note is so pressing I cannot refuse obeying your summons for the 27th and have accordingly written to my pair Mr Symonds to give notice that I cannot continue my arrangement with him any longer, but I shall be under the necessity of retiring into the country in the course of next week.
On 23 Jan. he wrote again to say that he must be back in the country by 4 Feb. and, as ‘the Catholic question’ was not coming on on 2 Feb., hoped that he might be excused then too, promising to come back after 9 Feb.
Cotterell was listed a Treasury supporter after his re-election in 1812. He opposed Catholic relief, 2 Mar. and 24 May 1813, as also on 21 May 1816. He rallied to ministers on the civil list questions of 8 and 31 May 1815 and 24 May 1816, on the army estimates, 6 and 8 Mar., and on the public revenue bill, 14 June 1816. On the other hand, he was in the majority against the property tax, 18 Mar. 1816, and opposed the duty on farm horses, 14 June. He opposed Admiralty retrenchment, 17 Feb. 1817, and voted for the suspension of habeas corpus on 23 June. He was a member of the Pitt Club, on the ministerial dinner list in 1818 and invited to hear the ministerial case for the ducal marriage grants, 13 Apr., but did not vote on 15 Apr.
On 21 Feb. 1818 Robert Price wrote: ‘Sir John Cotterell our Tory Member has lost a great deal of his popularity, and is I really think much more open to attack than he has been at any time since his first election’.
