The previous owner has peeled off the options sticker (FFS!) ... is there another way of knowing what options are on the car?

Peeled it off from where?

There is one in the service book and one in the boot I think.

Peeled it off from where?

There is one in the service book and one in the boot I think.

That is correct, there should be both one in the boot and the owners manual.

Handbook missing, sticker peeled off ... bugger.

I would like to know for sure what turbo set up I have, AGR or ALH etc

Check the VIN, visible on the outside of the windscreen, below the passenger window wiper.