I'm not sure if this is the same for their other models but I bet there's a big pile of Windows machines sitting in an EU warehouse.
To add insult to injury, I asked if they could improve the price in a web chat and the guy botched it so hard he added an extra £93 onto the price. Outsourced, off-shored support at its very worst.
In the end I dropped a fraction of the money on a next-day-delivered Thinkpad 13, tore Windows off it and raised another flag for glorious penguin.