 Its most famous supporter of the time was the novelist Daphne du Maurier.One of Mebyon Kernow's main campaigns is for a Cornish Assembly and in 2001 it presented a petition to 10 Downing Street with 50,000 signatures in favour of the Assembly.This was backed up by Cornwall Council's Feb 2003 MORI poll which showed 55% in favour of an elected, fully devolved regional assembly for Cornwall and 13% against.