I renewed mine in Sept, and found using different comparison sites gave you different quotes. Also on Go Compare (F***ing hate that pi**ing advert) I put my insurance date as 18 December which went beyond there 60 day quote limit, and for some reason that made the quotes go down by nearly £100, then when accepting the quote, just changed the start date back to September!
Strange! but it worked!
Treat every problem as your dog would; if you can't eat it or f**k it, pee on it and walk away!