On 12 October 1485 he was created Chancellor of the Exchequer for life; on 27 October he became esquire of the body to Henry VII, with a pension, and he was advanced to be knight the body to the King before August 1487. He was also treasurer of the King's and Queen's chambers. In the parliament summoned for 7 November 1485 Lovell was chosen for Northamptonshire, and on 8 November 1485 he was elected speaker. He headed the commons on 10 December 1485, when they requested the king to marry Elizabeth of York, to whom he subsequently lent £500 on the security of her plate. On 3 July 1486 he was one of the commission to treat with the Scots. He probably continued to sit in parliament, though it is only certain that he was elected to that summoned for 16 January 1497. Sir John Mordaunt was chosen speaker in 1488. In 1487 Lovell sided with King Henry against Lambert Simnel, and he and his brothers fought at the battle of Stoke, where he was knighted. On 11 March 1489 he became constable of Nottingham Castle. The services rendered by Lovell to Henry VII included an active participation in the king's policy of extortions: numerous bonds which were made to Lovell, as well as to Richard Empson and Edmund Dudley, were cancelled early in the reign of Henry VIII. In November 1494 he was present at the tournaments celebrating the creation of Prince Henry as Duke of York, and in 1500 he accompanied the king at his meeting with the Archduke Philip near Calais. In 1502 he became treasurer of the household and president of the council. In 1503 he was made Knight of the Garter. About 1504 he appears to have been high steward of the universities of Oxford and Cambridge. He acted as an executor for Cecily, Duchess of York, Lady Margaret, Countess of Richmond, Henry VII, Sir Thomas Brandon, John de Vere, 13th Earl of Oxford, and Sir Robert Sheffield.
Under Henry VIII
Henry VIII continued to employ Lovell. He was reappointed chancellor of the exchequer, and at Michaelmas 1512 was appointed Constable of the Tower of London. From 14 June 1513 he served as Master of the Wards. He was steward and marshal of the household. On 3 September 1513 he was commissioned by Catherine of Aragon to levy men in the Midlands for service against the Scots, and on 12 May 1514 either he or his nephew Thomas, who had been knighted at Tournai in 1513, landed at Calais with a hundred men, and was shortly afterwards joined by three hundred more. The rise of Thomas Wolsey's power seems to have affected his position. Ambassador Sebastiano Giustiniani wrote on 17 July 1516 that Lovell had withdrawn himself from public affairs. On Ascension day 1516 Margaret, queen-dowager of Scotland visited him at Elsyng Palace, near Enfield, in Middlesex, a house he had inherited from his brother-in-law, Edmund de Ros, 10th Baron de Ros, in 1508.. In 1520 he travelled to France with the other Garter Knights to take part in the meeting between Henry VIII and Francis I of France now known as the Field of the Cloth of Gold. On 14 May 1523 he was reported to be very ill, and he died at Elsing on 25 May 1524. He was buried in a chantry chapel he had built at Holywell Priory, Shoreditch, a religious house of which he was regarded as a second founder. His funeral was very magnificent. His portrait was formerly in a stained-glass window in Malvern Priory.
Family
His eldest brother, Gregory, inherited Barton Bendish, was knighted at the battle of Stoke in 1487, and was, by Margaret, sister of Sir William Brandon, standard-bearer to Henry at Bosworth Field, father of Sir Thomas Lovell of Barton Bendish and of Sir Francis Lovell, who became adopted son and heir to his uncle. Another brother, Sir Robert Lovell, was made a knight-banneret at Blackheath in 1497. Margaret Brandon Lovell later married Hugh Manning. Thomas Lovell married, first, Eleanor, daughter of Jeffrey Ratcliffe; and, secondly, Isabel, sister of Edmund de Ros, 10th Baron de Ros, of Hamlake, a widow, but left no issue.
Legacy
By the numerous grants which he had from Henry VIII he died very rich. Lovell contributed towards the building of Caius College, Cambridge, and built a gateway for Lincoln's Inn. He also built a manor-house at Harling in Norfolk. The greater part of his estates passed to his nephew Francis, whom he calls in his will his cousin. Francis was succeeded by his son, Sir Thomas Lovell, and had another son, Gregory Lovell, who was cofferer to the household, and received a lease of Merton Abbey, Surrey, from Elizabeth I in 1587. Lovell had also worked with Lady Agnes Mellers who had become a rich widow in 1507 and he assisted in her wish to found what would become Nottingham High School.