Ah great - do let us know how you get on and if it is quite straightforward to do? I will be doing mine to in the spring/summer this year using the EK151 battery.I took a glimpse with a photo camera to the battery.
I want to change it in the summer.
It's a Jaguar CX23-10C655-AC
It seems to be
EXIDE EK151 AGM 12V 15AH 200A Auxiliary Battery JAGUAR LAND ROVER CX23-10C655-AC