Here is a run through of what you need to remember with unseen poetry.
Below are some more practice papers and an exemplar essay based on the June 2017 exam question on the two poems called 'Cats'.
https://qualifications.pearson.com/en/qualifications/edexcel-gcses/english-literature-2015.coursematerials.html#filterQuery=Pearson-UK:Category%2FExam-materials