After Henry VIII suppressed the priory, his troops used the remains as a naval store. In 1542 Henry VIII ordered the Earl of Rutland to fortify the site against possible Scottish invasion. By December 1547, Ralph Cleisbye, Captain of the fort, had guns that included a wheel-mounted demi-culverin, 2 brass sakers, a falcon, and another fixed demi-culverin. However, Beblowe Crag itself was not fortified until 1549 and Sir Richard Lee saw only a decayed platform and turf rampart there in 1565. Elizabeth I then had work carried out on the fort, strengthening it and providing gun platforms for the new developments in artillery technology. These works in 1570 and 1571 cost £1191. When James I came to power in England, he combined the Scottish and English thrones, and the need for the castle declined. At this time the castle was still garrisoned from Berwick and protected the small Lindisfarne Harbour.