Lo welsh boy, I'm from south walesmyself. The adaptor doesnt cast a shadow, but the wide angle lens that can fit on that adaptor does. I am getting the adaptor to place a filter lens on it for protection.
PS did you get stung for duty from 7dayshop. I cant stand that place, they are a bunch of lames. They advertise massive savings, and a few of my friends have been hit with duty 4 weeks after purchase that places their goods up n over the price you would pay on the street!
Good luck with the camera, I'm loving my Z2 :-)
Also you can buy the adaptor form cameras2u (UK) or amazon USA (very cheap).