Is the Asus Transformer Book a tablet? A laptop? Both! And Currys is selling the newer T100TA model (vs. the plain old T100) for £249 (was £329.95), complete with keyboard and Microsoft Office Home and Student 2013.
Asus Transformer Book T100TA specs include a 10.1in display (1366 x 768), quad-core Intel processor, 2GB RAM, and 32GB expandable storage. Oh! And it runs Windows 8.1.
(Thanks to MSPreacher at HUKD)