OK it's arrived at Heathrow. Had a £1200 customs bill which I paid. What I found interesting was the seller insisted I show him the completed VAT transaction before he'd activate the warranty on the watch - either this is a Credor stipulation or he's very vigilant about ensuring correct customs charges are paid on everything his store ships! Not an issue on my end as I'd factored in paying import VAT but I've never had a retailer go to this length before!