Because?
Tarquin is really a Dalek - he actually meant: "HE'S EX...ELL...ENT! EX...ELL...ENT! EX...ELL...ENT!...I just uploaded a Dalek cartoon to twitter: http://tweetphoto.com/23218817
When? They got away. Only two daleks got killed and they got killed by other daleks.
I must have fallen asleep.