Coote sat on his family interest for the Queen’s County 1776-83 and for the borough of Maryborough 1783-97, on account of which, as co-proprietor, he received £7,500 on its disfranchisement. He resumed his seat for the county in 1797, being by then a placeman with £1,000 p.a., who could be relied on to support government on all occasions and had a reputation for somniferous oratory.
Coote spoke at least twice at Westminster: on 27 May 1801 for the continuation of martial law in Ireland, and on 10 June, to disoblige his colleague Parnell, in opposition to the latter’s proposal to exempt John Beresford from the Irish Members’ disqualification bill. He was loath to attend in October 1801, having been detained in Ireland by military and official duties, his wife’s and his own illness, but when pressed by the chief secretary he wrote, 30 Oct., ‘your wishes and those of Mr Addington supersede every other feeling’.
When in 1814 he applied for promotion in the peerage ‘as the close and recompense of his services’, the chief secretary reported to the viceroy:
I cannot say that I think Lord Castlecoote’s a very strong claim. He is an Union peer (of course according to his own account, not made for Union services), but as he happens to have been made on the same day with 14 others (31 July 1800) one cannot but have a little doubt on that point. He has been and is chief commissioner of customs. This was once considered, I dare say, a very important office, but as in recent times it has not been thought expedient to adhere to the former practice of making the head of a revenue board a privy councillor, on the same principle, perhaps, service at the board cannot be considered as conferring a claim to a more distinguished honour. If it can, Lord Castlecoote’s claim, I fear, would rest rather in the length than the efficacy of the service.
Add. 40287, f. 92.
He died 22 Jan. 1823.
