Funny you should say that. Mine's due shortly so I've started the merry-go-round, the meerkats gave me Admiral as the cheapest with x amount. I did the same quote but through Admiral directly online (identical details), it came to x amount +£30. I phoned them to confirm a couple of things, nothing was actually changed on the quote yet they "confirmed" a third figure (x amount -£9, incidentally).
I'll be seeing which random numbers the forum supporters can come up with in due course.