Normally £29.24, now 50% off. The cheapest it has ever been so far (cheapest previous sale was £21.93).
This expansion pass gets you Blizzard Mountain and the new Hot Wheels maps. This works out at £7.30 each. Amazing price considering when Blizzard Mountain was on offer it was for £8.37. So it's a great deal if you don't have Blizzard Mountain yet or if you are itching to try the Hot Wheels Expansion pass (currently at £16.74), you could get this pass for £14.62 and save yourself over £2 (if you get my drift).