Hey guys. Just as a heads up to those sitting on the fence as regards to pre-ordering a Wii U in the UK, I just now placed an order with Shopto for a premium model (after much indecision). 5 minutes after placing the order they raised a ticket on my account to let me know that they have secured enough stock so that I'll get my order on launch day. I was expecting to have to wait a few weeks, if not until after xmas, to get hold of one.
Long and short: Shopto have guaranteed Wii U premium consoles available for day 1 even at this late point, so if you want to get an order in, I'd guess this is the place to go.
As an aside, it seems they'll start processing preorders on the 23rd (Friday) according to their ticket.