The exact date of Norris’s birth cannot be established, but he may have been born sometime in the first half of Henry IV’s reign, for after his death one of his heirs claimed that he had been more than 80 years of age when he died.
Norris trained in the law and, while no details of his early education have come to light, before Easter 1450 he had been admitted to Lincoln’s Inn, where he was serving as escheator three years later.
Norris’s professional activities were, it seems, principally focused in his native shire.
It also seems likely that John, by now a leading member of the court circle dominated successively by the almost equally embattled dukes of Suffolk and Somerset played some part in starting Thomas on a parliamentary career which saw him elected and re-elected to no fewer than four successive Parliaments. These Parliaments spanned one of the most dramatic periods of Henry VI’s reign, encompassing the impeachment by the Commons, fall and murder of the duke of Suffolk, the loss of Normandy and Gascony, the south-eastern uprising of 1450, and Henry VI’s descent into madness. It is regrettably uncertain what part, if any, Norris played in the deliberations of the Commons during these upheavals, but it appears that he made time to pursue his private affairs to the detriment of his parliamentary duties. Thus, on 10 May 1450, when Parliament was in session at Leicester, Norris was by his own account at Westminster, where he delivered a sealed bond to the Chancery clerk William Godyng* for safe-keeping.
It may be a mark of Norris’s relative obscurity among the parliamentary burgesses that in spite of his repeated Membership of the Commons he did not subsequently come to play an enhanced part in public affairs. He was present at the Wiltshire county elections to the highly partisan Coventry Parliament of 1459, and may, indeed, have been regarded as rather too closely associated with Henry VI’s court, for not long Edward IV’s accession he was dismissed from his duchy office, while other long-serving holders of similar appointments, like George Howton* (a fellow Member in all of Norris’s Parliaments), were confirmed in post. Nevertheless, before long Norris was able to make his peace with the new rulers, and in 1467 was rewarded with an appointment as escheator of Wiltshire and Hampshire. There is no reason to suppose that his conduct in this office was particularly controversial, but he did subsequently take the precaution of suing out a general pardon to protect himself from legal challenges.
Norris’s final years were dominated by the disposition of his property, driven by his lack of a direct heir. At the time of his death on 11 Apr. 1489 his heir-general was found to be his four-year-old great-niece Alice Litelcote, grand-daughter of his sister Joan, who had married Ralph Litelcote of Enford. If Norris had made a will (none is known to survive), it seems that rather late in the day, probably while already on his death-bed, he had a change of heart. On 26 Mar. he sealed a deed settling the bulk of his property on his two half-brothers, John and Richard Norris. Not long before, he had sold his manor in Newton Toney to John Mompeson*.
