Usually there is a fair amount of extra waiting, sometimes there really isn't.
2 examples, back round Christmas I had a Force Awakens Squad Leader delivered, this was around the time everyone got them from Slideshow (may have been about a week) while I got Ant-Man and Nick Fury about 3 weeks ago which is a couple of months after those in the US, all 3 came from the same retailer.
Its a bit hit and miss.
With this guy most of the estimates from UK retailers are sometime in November or December, doesn't mean thats when they will arrive but usually its a pretty good estimate. I don't know what its like with other European sellers.