I'm struggling with structuring my essays. Have you got any advice on this?

The structure of your essays in History, and other humanities subjects, during A-Level will be important in determining your grade so its appropriate to ensure your structure is logical, and coherent. You could follow a simple structure such as PEEL (Point, Evidence, Explain, Link.) You first come up with the points of your essay. For an A-Level essay, especially during an exam, it's appropriate to choose 4-5 points. For each point there should be several pieces of specific evidence that supports it, and explanations of how this evidence is relevant.

For example, if we were to answer the AS History question "Louis XVI was primarily to blame for the financial crisis of 1788, we would start with our points. Address the question first by discussing whether Louis was to blame. Then counter these points with potential counter-arguments. These could range from the Marie Antoinette to the nobility. Evidence to support that Louis was to blame could be his silly decision to go to war with Britain during the American War of Independence, or how he gave into Marie Antoinette's demands. However, we could counter these points by arguing that it was the nobilities fault for the financial crisis due to their stubborn refusal to accept, for instance, the May Edicts, to reform the state. We would explain that these edicts had the potential to correct the ills of 18th century France, and link back to the question by arguing that therefore the nobility were as much to blame as Louis.