To give you some suggestions it would help if we had some idea of your areas of interest - Ancient, Medieval, Early Modern, Modern, American, Australian, Asian, Pacific, African, European, Russian etc.
I will give an idea for each of the above - not on the syllabus.
Ancient - degree of romanisation in Britain
Medieval - degree of normanisation of England after Hastings
Early Modern - gains of Parliament due to English Civil War and Interregnum
Modern - Genocides since WWII
American - role of election of Lincoln to the outbreak of the American Civil War
Australian - development of demoracy as a result of the Eureka Stockade
Asian - Pakistani Civil War (that resulted in East Pakistan becoming Bangladesh)
Pacific - various coups in Fiji
African - reactions to decolonisation - differences depending on which European power had been the coloniser
European - Hungarian or Czechoslovakian uprisings - something on Tito - Franco and survival - or even more interesting restoration of Spanish monarchy and role of Juan Carlos in keeping Spain a democracy
Russian - anything on character and achievements of some early Tsars - Peter, Catherine or even 19th C early Tsars e.g. succession 1825
With just a simple list like this it is clear that the range is overwhelming - and why I asked for some ideas of you interests.
Music or Art could also lead to other projects. If IT or D&T are interests what about some early discoveries etc etc. If Sport is an interest again heaps and heaps of options e.g. Bodyline has a bit of historiography due to the fact that there are volumes written by so many of the players as well as the British view being different to the Australian.