XF 2.7d water pump

[Squishey]

Is the water pump on an XF 2.7d driven by the cambelt or the auxiliary belt?

I'm being given conflicting information about whether to replace the water pump during a cambelt change or not.

[littleredrooster]

When it was cambelt-change time on my S-Type, I had the cambelt, aux belt. water pump and coolant flush all done at the same time. Minimal extra cost, maximum peace of mind, no-brainer.