[SLC]

Apart from the BSI, I have read this on a local forum:

To turn TPMS on or off you can go into new vehicle prep and accessories then deactivate/reactivate TPMS

This is using Diagbox, obviously.

 

[SLC]

I suspect it's in the left hand rear quarter somewhere - accessible from behind a panel on the side of the boot/rear luggage compartment.

But that is just a guess.