If you look at Andersons drop the ball comes from behind Priors pads as it turns from middle-and-leggish. That said he should still have caught it - is Anderson really the best slip fielder England have or was he having a rest at slip?
As mentioned in this post, dropping Misbah could be a critical point in this match! Still not a bad day for England though, early wickets tomorrow and then bat for a couple of days - easy
. A couple of batsmen really need runs in my opinion so will be interesting to see how they go!