I did these papers for my actual GCSES this year and I am going to tell you now that edexcel only release the most recent papers that have been sat the following year at around April (This does not include AQA or OCR which release their most recent papers on the 1st of May each year). Eduqas on the other hand releases their most recent papers in March with their examiner reports being released on results day each year. If you are looking for Edexcel math papers for this year then just go to youtube