 2021

Source paper: www.whatdotheyknow.com/request/oxford_physics_past_papers_2/response/2340696/attach/9/Physics%20Papers%202020.pdf?cookie_passthrough=1

The source is on bundle pages 34–41. Its cover gives Trinity Term 2021 despite the attachment's 2020 filename. These solutions use natural units $\hslash =c=1$ unless a conversion is written explicitly.