Then in 1553, John's only son Walter 'engaged the Kentish insurrection to approve the marriage of Queen Mary, headed by Sir Thomas Wyatt, and was taken prisoner with him, sent to the Tower, and subsequently executed in Kent on 27th Feb, 1553'. He lost his estate to the Crown, though the Manor House was kept by the family because John Mauntell had made a settlement of the manor to his wife Anne. Anne took a second husband, Richard Johnson, who together with Francis Morgan, 'serjeant-in-law', 'levied a fine of the three manors of Heyford, Over Heyford, and Nether Heyford, and the Advowson of Nether Heyford.