If anyone was thinking at all about upgrading to Windows 8 at some point before 2015, today is the last day that it will be £25 (plus tax) to buy Windows 8 Pro. After today it goes back up to £150+.
I considered buying it and saving it onto a USB for future use, but thinking about it, i think i'll just survive with 7 until my laptop finally dies, and then just buy a new laptop with 8 already on it.
Anyway, 31st Jan is the last day for that deal.