Yes, thanks for the replies
The choices available turned out to be the HP12, 16 or... I thought it was 25, but was straight off a plane and it might have been 21. Whatever, it was too expensive. I had been hoping for the 18 which I really, really like, but as it came down to the 16 or the 12, I stuck to the 12.
Just about to open it now as a matter of fact. I like the duty free 1 litre bottles.