I want to go to England in August. Will airfare be cheaper now, or will I get a better deal closer to August?

If you're travelling in August, then it doesn't matter when you book your ticket it will still be at peak season prices cause that's when you're using it. The benefit to booking it now is that England is a very popular destination in itself as well as a great place to kick off a European vacation, therefore tickets might be limited if you wait too long. I loved England when I was there and I'm sure you will too - have fun!