Byngley was evidently a local man but his early life and family connexions are obscure. There is no evidence to link him with the John Byngley who enlisted under Thomas Chaucer* for service in Henry V’s first invasion of France in 1415,
Byngley had already served as a jurat of Dover when he was elected to his first Parliament which was called to assemble at Leicester on 16 Feb. 1426, and, although a list of jurats is missing for 1425-6, it is likely that he was still serving as such when chosen as a parliamentary baron. He received wages for attending Parliament from 14 Feb., when he probably left Dover for Leicester, until 28 Mar., and then for the second session from 23 Apr. until 6 June, almost certainly the day he arrived back home. He received full payment within weeks of his return, being paid at the rate of 2s. 6d. a day until 19 May, and thereafter at only 1s. 8d. a day.
After this, Byngley continued to be employed in the affairs of the town of Dover. The following year he was chosen as one of the four chamberlains and may have served as Dover’s bailiff to Yarmouth. He also received 7s. 10d. for payments made at the special request of Walter Stratton*, the mayor. Like many other leading Portsmen, he became involved in Dover’s dispute with Faversham over the payment of the townsmen’s contribution as a member-port. In 1428-9 he was paid 18s. 8d. for time spent at Canterbury and arranging horse hire for Dover’s representatives there, and he returned to Canterbury the same year to plead with the King’s ministers concerning the parliamentary subsidy. The same year he rode with John Braban* to discuss matters with the Portsmen of Hythe, and received 12d. for supervising the watch In November 1429 he attended Henry VI’s coronation, along with Stratton, and received 20s. for six days attendance.
In July 1433 Byngley served for a second time as one of the barons for Dover, sitting again alongside the town clerk, Thomas Frankleyn*. Both men attended Parliament for 42 days. On this occasion, however, the payment of parliamentary wages was a little more drawn out, with Byngley not being satisfied of his full entitlement until the following year. He also travelled to New Romney to deliver 20s. owed to James Lowys*, who had continued to represent Dover’s interests at Westminster after Byngley and Frankelyn had returned home.
Little evidence survives of Byngley’s private affairs, but it seems clear that his connexions were mainly with Dover and the other Ports. In July 1426 he acted as one of the feoffees of John Braban and John Baker in granting a messuage in Snargate ward to John Dalby, rector of St. Nicholas’s parish church, free of rent on condition that he would offer prayers for the soul of John Strete†, a former mayor of Dover.
