Nice try then Robert. I would have told them that the warranty they are referring to is wholly irrelevant. If a Battery has only lasted that long, then clearly it was not fit for purpose, so replace it free of charge or I will write to your Dealer Principal who will I am certain be fully conversant with the Consumer Rights Act of 2015.
Keep that in your Locker matey. There are a lot of crooks out there.
Just wait until RICHIE READS THIS !