In 1824 Ferdinand asked the French for help to restore an absolute monarchy and an army of French and Belgian volunteers, the Hundred Thousand Sons of Saint Louis, invaded Spain. The Liberals were defeated and many of them fled abroad, including Nebot who settled in London. In 1825 he went on a secret mission to Ireland on behalf of Lord William Bentinck and he may have visited Ireland again after this. Historian Charles M. Wilson assumes that Nebot took part in a failed attempt to enter Spain through Portugal in 1827 and was involved in the July Revolution in Paris in July 1830 and in the planned invasion of northern Spain across the Pyrenees in October 1830. In January 1831 Nebot wrote to the Spanish ambassador in London, Francisco Cea Bermúdez, asking for permission to return to Spain. The Spanish government replied to Cea Bermúdez's letter saying that they did not trust Nebot but would allow him to return if he agreed to act as an anti-Liberal spy. Nebot reportedly never returned to Spain.