Looks good, Pivot! Nothing like a good ESB, imho.
I'm curious that there are no 60 minute hops. Where did you get the kit from? Perhaps you could contact them and ask - do the directions only call for a 30 minute boil?
I don't really know if you should be worried about the Nottingham, but if you are, you could substitute Safale US-04 or Danstar Windsor (both are dry yeasts).
