Feudal barony of Dunster King Henry VII (1485–1509), he obtained the reward from that king of a reversal of his father's attainder and received restoration of his lands from the Herberts, who had never lived at Dunster, having been long seated in Wales. He was instrumental in quelling the rebellion in Devon. In 1487 on the coronation of the queen he was appointed K.B.. He was Sheriff of Somerset and Dorset in 1488. He erected the surviving sculpted stone heraldic panel above the western arch of the Gatehouse to Dunster Castle, showing on six shields (a further two blank) the arms of Luttrell, Beaumont,
Dunster Castle Howards regiment. During this period the castle still kept an armoury of 43 muskets. Francis died heavily in debt in 1690, and his widow Mary moved the contents of the castle to London, where they were destroyed in a fire in 1696. At the start of the 18th century the Luttrells and Dunster Castle faced many financial challenges. Francis's son Alexander, inherited the castle when he came of age in 1704, but it was still mostly empty and carried large debts with it. Alexander died young in 1711 and his widow, Dorothy, spent almost twenty years paying off the debts.