 Nevill was also nominated, without his knowledge, as the candidate for Seaford on the Treasury interest and was returned there after a contest, together with Sir Peter Parker, on 30 March 1784.The losing candidates, Lewis Watson and Thomas Alves, were supported by the Pelham family, led by the Duke of Newcastle.Watson petitioned against the election, on the grounds that the bailiff had failed to give four days' notice of the election, and it was declared void on 21 March 1785.