Tufnell was the grandson of Richard Tufnell, a prosperous brewer, M.P. Southwark 1640. At the age of 17 he succeeded to the family estate, subject to the trusteeship of his uncles, Sir William Jolliffe and Sir Edward Northey, till he came of age. He was called to the bar but, though he became a bencher, there is no evidence of his having practised.
let drop an insinuation, as if many who followed his opinion in the business of the impeachments, did it rather out of compliment to his power, than to his person,
whereupon Tufnell,
resenting this innuendo, immediately repelled the dint of it, by appealing to that honourable Member ‘whether he ever made his court to him?’ ‘And whether he had not paid him more respect since he was out, than when he was in place?’
During the split in the Whig party he was given a temporary place which lapsed in April 1719, after which he spoke against the peerage bill. After the collapse of the South Sea bubble in 1720 he supported Walpole’s efforts to damp down the proceedings against its authors, speaking with him on behalf of Sir George Caswall on 10 Mar. 1721 and on 2 June seconding a motion for allowing one of the directors to retain a substantial part of his confiscated estate. A few days later the secret committee of the Commons on the South Sea affair presented a report containing the names of a number of Members, including Tufnell, who, while the South Sea bill was before the House, had allowed themselves to be put down by the Company for stock without paying for it on the understanding that if the bill went through and the stock consequently rose, they would be entitled to receive the difference.
Tufnell was out of Parliament till 1727 when he successfully contested Colchester as a Walpole Whig, voting for the excise bill and against the repeal of the Septennial Act. In 1732 he was appointed a commissioner, with an allowance of £4 a day, to treat with the commissioners of the Emperor and the States General on commercial and other matters arising out of the treaty of Vienna.
Tufnell did not stand in 1734 but was returned on Walpole’s nomination for Great Marlow in 1741,
