gcse history to history a level

for history a level -

am i going to need to fill in any ‘knowledge gaps’ from gcse to be prepared for a level?

i know i should probably look at question layouts and plans but other than that, is there anything else i need to know from gcse history for a level history?

these are the topic i did at gcse -
- america: opportunity and equality
- conflict and tension in asia: korea and vietnam
- britain’s people: elizabeth england
- britain’s health: medicine

these are the topics that i will do at a level -
- Tsarist and Communist Russia 1855- 1964 *Part One 1855-1917
*Part Two 1917-1964
- Wars and Welfare 1906-1957 Part One 1906- *1929 Part Two 1929-1957
- Historical Investigation

thank you