How hard can it be to photograph a stationary, well-lit bottle of perfume? Well, if it's in Harrods window it can be pretty tricky; each image is 3 frames for HDR (a bright, dark & middling version combined), each of those done 3 times with a 12' black backdrop moved between shots to prevent reflections in different parts of the picture and those 3 composite frames merged in the Darken blend mode in Photoshop so that all the reflections disappear; then of course you have to contend with people (outside Harrods at 10pm is busier than Oxford St in the daytime), the wind threatening to tip your backdrop onto the cabs in the adjacent rank, the massive temporary hoardings erected around the building restricting access and not least of course the other photography team doing the same thing in the next window.