Where is the battery located on a 2007 Jaguar XK convertible?

Hi, the battery is at the rear of the trunk/boot compartment, remove the floor panel (lift handle and pull the panel out) then remove the luggage cover 9the soft "blind" that is moved when lowering the roof) this lifts backwards and up. There are four small round "knobs" at each corner or the vertical panel facing you at the rear of the compartment (the rear of the back seats) remove these by unscrewing counterclockwise (they then pull out) the vertical panel will now come free when pulled to reaveal the battery in the top left hand corner, it has security bolts on the front retaining bar and 10mm bolts on both terminals and the right hand safety retainer. (NB the positive terminal is on the right, the negative terminal on the left) I hope this helps, regards, Baz