Mel, I notice you've been posting some very helpful advice for other forum users. Thanks! And, of course, that's good for you too. One reason that both basic composition and advanced writing instructors use peer feedback groups is because we learn even more about writing by reading and reflecting on others' work.
For this essay, I'm glad to hear that you're excited by the topic and have done so much reading already. I want to encourage you not to close off your possibilities by narrowing your topic too quickly. While you certainly could do a very simple compare and contrast essay looking at just those two pieces of legislation, there might be something more complex you want to say. For example, you might want to choose just one aspect of early years social policy and trace that all the way back.
Have you done some prewriting (brainstorming, mind mapping, or freewriting)? Have you looked through all of your notes on your readings and let your mind wander over and around the issues and ideas that most interested you? If this is the field into which you'll be going, it's this kind of mental work that will develop your own thinking and expertise.
If you do choose to compare the two Acts, be sure to fully cover the social and political forced that led to the enactment of each in its time. It doesn't matter which you pick to discuss first. You could use the current act as your touchstone, going back to compare it with the legislation that preceded it. Or you could start in 1989 and simply move forward in time using chronological organization. Either way, it would probably be good to use at least a paragraph to summarize what came before 1989.
Simone, EssayForum.com