Police are holding aristocrat Constance Marten and her partner Mark Gordon in custody after arresting the paid in Brighton - but an urgent search is underway to locate their baby, who is said to have not had any medical attention since its birth in January.
The Met Police said that Constance and Mark were spotted by Sussex Police in Stanmer Villas, Brighton on Monday evening - with a member of the public coming forward with the sighting just before 9.30pm.
35-year-old Maren and Gordon, 48, have been travelling the UK via taxi after their care was found aflame on the M61 in Bolton, January 5.
