Although his parentage is unknown, Jenner had connections with various people of the same surname in north Wiltshire and south Gloucestershire, including John Jenner, a yeoman of Crudwell, a parish four miles from Malmesbury, who appears to have been his brother. It is highly likely that Jenner himself came from the same area.
During the economic crisis of the early 1620s the use of gold and silver thread was widely criticized for contributing to the shortage of coinage. Consequently a Proclamation was issued in June 1622, which prohibited its manufacture and gave the Mint sole right to purchase gold and silver bullion.
Jenner was sufficiently wealthy by 1624 to purchase Widhill manor, in the parish of Cricklade, as well as Eisey over the border in Gloucestershire.
Jenner played no recorded part in the 1629 session. Later that year he was elected one of the renter wardens of the Goldsmiths’, but he initially refused to serve, only acquiescing after he was given permission to employ his former apprentice, Gibbs, as deputy. He agreed to provide the customary renter’s dinner only after the Company committed him to Newgate gaol. His apology to the Company was considered ‘imperfect’ and he was obliged to re-write it.
Jenner sat for Cricklade in both the Short and Long Parliaments, when he was heavily engaged in the business of the committee for compounding, but was secluded at Pride’s Purge. Royalist forces pillaged his house during the Civil War, for which he was later granted £500 compensation.
Jenner died the following day and was buried at St Sampson’s, Cricklade, where a tablet was erected to his memory.
