Edward IV died in 1483, leaving the kingdom to his young son, Edward V, but his uncle, Richard, Duke of Gloucester, had his own ambitions for the throne. Lord Hastings was unwilling to support the deposition of Edward V and, as a consequence, Richard summarily executed him that June, ahead of his own coronation. Kirby Muxloe and Lord Hastings' other estates were then restored to his widow, Katherine. After a short pause, Katherine continued some work on the site until the summer of 1484, focusing on making the corner tower and partially finished gatehouse habitable, before the project was finally halted. By this point around £1,000 had been spent on the works, including the laying of 1.3 million bricks.