I also live in the UK and would be 'happy as larry' if Wii U launched for £250 (im expecting £300), the fact that PSV is £240 in shops makes the idea of a true next gen console that will last at least 6 or 7 years for £250 sounds like a bargain to me.
I imagine they will bundle a game to show off the the tablet controllers unique abbilities aswell, so £250 would be more than fine with me.
Even if it's £300, the fact that the tablet will let you surf the net, browse the Nintendo Network and prob play all the Nintendo store games from past generations (prob not Gamecube), i feel it would be more than worth the money as it will double up as a very simple Ipad.
Be careful what you wish for.
Priced too high and the Wii U will draw unfavourable comparisons with ipad or even, by then, a £200 Xbox 360 with a capacious 250GB (or higher) Hard Disk Drive.
I wouldn't take PSV as any kind of indicator either - it did a record-breaking launch in the UK (record breakingly bad that is). It's recently been reduced to £197.00 at Amazon and Asda and will doubtless fall much further by Xmas 2012 when Wii U arrives. Most retailers introduced it at just under £230 btw.
As far as I'm aware, Wii is the only Nintendo console to have remained on the market without a successsor for this long. Most Nintendo consoles see a successor within 5 to 5.5 years of their current console.
£200 [the equivalent of just over US $317] for a basic pack with a Wii Sports type pack in does not sound unreasonable to me.