 2022

Source: www.whatdotheyknow.com/request/oxford_physics_past_papers_2/response/2340696/attach/10/Physics%20Papers%202021.pdf?cookie_passthrough=1

Source bundle pages 31–39. The cover dates this paper to 2022; the attachment filename says 2021. These solutions use natural units $\hslash =c=1$, except where units are restored explicitly.