UKIP think so, and have written to the Government accordingly.
He is arguably (undoubtedly?) the most influential British politician of the last 20 years - perhaps even moreso than Blair.
It’s easy to mock him for all the battles he lost but ultimately he won the war, and with the democratic backing of the people. If not a full on knighthood, then at least some form of recognised honour. I don’t particularly like the man, and disagree with his politics, but he seems more deserving than many others who have been rewarded.