In the very very rare case you don't own portal 2:
Portal 2 is now on sale on steam for 50% off!!
So that's
?9,99; $9,99 or GBP 7,49

So if for some reason you don't have portal 2: get it now!

I just saw that... awesome!

lol i cant imagine anyone reading this doesn't have it...

BUT thanks for the heads up! I'm going to go tell everyone I know doesn't have it yet to sack up

Cheers, I passed this on to a friend and he was delighted.