Collett’s family had made their money as Hertfordshire hop merchants. He differed greatly in politics from his father, Ebenezer Collett, a Conservative who had represented, but never visited, the Irish pocket borough of Cashel, 1819-30, having previously sat for Grampound.
Although Collett had no personal connection with Ireland, he was brought forward by Daniel Ferrall, the recently unseated Liberal member, for the venal borough of Athlone at a by-election in March 1843 as an advocate of civil and religious liberty.
Collett survived two petitions against his return. The first was promptly dismissed, 31 May 1843, but a second petition alleging bribery was presented in August 1843 and was not rejected until 5 March 1844.
Although Collett rejected repeal at this stage, he divided against the Irish arms bill in June 1843, and backed William Smith O’Brien’s motion for a committee of the whole House to consider Irish grievances, 12 July. He was also among the 29 Irish Liberals who attended a conference in London that August which issued an address to the English people calling for ‘perfect equality’ of political rights between Great Britain and Ireland.
Between 1843 and 1846 Collett was among the most active parliamentary supporters of popular radical causes. His votes in often small minorities in favour of various reforms included the redress of popular grievances, the factories bill, and an inquiry into the condition of the labouring poor. He also divided in favour of the release of the Newport Chartists, 10 Mar. 1846, inquiry into the imprisonment of factory girls at Dundee, 2 Apr., and the abolition of flogging in the army, 7 Aug. 1846.
A free trader, Collett voted consistently for the repeal of the corn laws, and, believing that religion was ‘a matter between man and his Maker’, favoured religious equality and non-sectarian education, voting for a committee of the House to consider Irish Church temporalities, 12 June 1844, and voicing his support for the Dissenters’ chapels bill.
Collett does not appear to have served on any select committees, but he sat on private bill committees concerning gas lighting for Leeds, metropolitan sewage manure, and the Colchester navigation.
Collett’s profound dislike of the game laws, which he denounced ‘as a remnant of feudalism and barbarism’, prompted him to pay the fines of game law offenders in order to obtain their release, and he frequently brought alleged abuses of these laws to the attention of the home secretary Sir James Graham.
When pressed on the issue of the repeal of the Union in November 1845, Collett had informed the editor of the Athlone Sentinel that he would continue to perform his duty to his constituents ‘fearlessly and independently’, acting as ‘the friend of the poor and oppressed’ and the opponent ‘of rank patronage and abuses’. He was, however, as yet unconvinced of the benefits of repeal, but pledged that if the question came before parliament he would not oppose the wishes of his constituents.
Collett was one of 33 repeal MPs who met regularly at the Reform Club to organise opposition to Whig ‘coercion’ in Ireland,
After leaving parliament Collett remained ‘a thorough Liberal’. He became a member of the Financial Reform Association in 1851, and continued to be ‘an opponent of foreign influence in English affairs’.
Collett’s first wife, whom he had married in 1826, was the daughter of Sir Thomas Gage, a noted botanist. She died in June 1845 leaving him a daughter,
