Had the iPhone 6S for a while now & seeing as EE were doing a deal with the iPhone Xs with 100gb of data for the price of 30gb it seemed a no brainer, Now I just have to go through the hassle of moving everything across & learning a new iOS & phone.
First attempt to update the iOS resulted in it bricking the phone, eventually persuaded it to update, now have restored the data back to it and all up and running.