A British aristocrat and her partner were on Monday both jailed for 14 years for the manslaughter of their baby daughter by gross negligence, as they sought to avoid detection by social services and briefly sparked a nationwide manhunt. Constance Marten – whose father was once a page to the late Queen Elizabeth – and Mark Gordon went to live "off-grid" in late 2022 when Marten was pregnant, prosecutors said. The couple's four previous children had been taken into care and the pair went on the run with the "clear aim of ensuring that no local authority would have jurisdiction over you", Judge Mark Lucraft said as he sentenced Marten and Gordon. Marten, 38, and Gordon, 51, slept for several...