Amazon - if you go to the Vita page, there's a link to their bundle offer. Basically, it's a WiFi Vita for 220, a free 8GB card and a game (from a small selection not including Uncharted and WipEout) for £15. So it's actually £235, and I just left the 2 quid first class postage option on it. I placed a separate order for Uncharted, so as not to confuse the offer (hey, it could happen!), so my total came to £277. I had an order in place at Game for a WiFi Vita, 4GB card and Uncharted for £270, so I'm pretty happy with Amazon's offer!
Don't worry if the subtotal alarms you - the discount comes off at the page you confirm the order.
Currently playing - 360: Skyrim // Wii: Skyward Sword // PS3: - // PSP: Dissidia Duodecim // PS2: - // 3DS: Tales of the Abyss + Resi Revelations // Windows Phone: - // Vita on pre-order \o/