Warren was determined on a naval life, and is said to have run away from Winchester to enlist.
In February 1781, having been discharged from the Helena, he wrote to Sandwich for another post, was appointed to the Merlin, and made up to captain. But this did not sweeten him for long. In the critical divisions during the spring of 1782, Sandwich had to exert all his influence to keep Warren supporting the ministry. On 25 Feb. 1782 he wrote to Robinson: ‘Sir John Warren certainly stayed and voted the other day. I have seen him since, and he told me that my second letter decided him to attend and give his vote.’
I owe no obligation to him and have received no favour at his hands. Indeed my last election had convinced me how friendly his intentions were by the great opposition I met with from him which was well meant though it failed in its effect. I was notwithstanding £2,000 out of pocket by it. These and many other reasons will prevent me supporting any member of Administration except your Lordship. I have supported the Government in two Parliaments, in which I obtained a seat by my own interest and my own expense, in return for which I have never received any favour.
25 Feb. 1782, Sandwich mss.
On 15 Mar. 1782, when Sir John Rous moved a motion of no confidence in the ministers, Warren absented himself. Sandwich brushed aside his explanation:
You may be assured that I shall never again trouble you on any parliamentary occasion ... All I attempted to point out to you was that voting against Lord North or me when the question was put upon either of us was exactly the same thing, as the fate of the one depended upon that of the other; but how you could distinguish that when the question was levelled at the whole Administration I was not a principal object of that question, I own is a mystery I cannot unravel.
To Robinson, Sandwich sent Warren’s letter, with the terse comment: ‘I believe you will join me in opinion that the writer of the enclosed is not only a rat but an idiot.’
Warren now resolved ‘not to interfere with the opinions of Parliament again these sessions’.
He died 27 Feb. 1822.
