The Purge had reduced the Commons to a rump of a little over 200 hard-line members. Lenthall remained in post during the debates and resolutions that led ultimately to Charles's execution on 30 January 1649, though there is no evidence that he was otherwise active in the events leading up to the regicide. Later he claimed to have sent money to the king at Oxford, and to have helped with the care of the queen and the royal children. He also used his influence, when he thought it safe to do so, to help some royalists, using his casting vote at times to save the lives of some.