Friend (18m) sent himself intimate videos of me (18f) from my phone. (England)

My ‘friend’ offered to repair my phone with a new screen and had my phone for several hours while he did it (with the passcode). I later found that he had sent himself pictures and videos from my gallery and tried to delete the evidence. What law, if any, has he broken and what should I do next?

Edit: thank you all for your advice. I took relevant screenshots and conducted ‘friend’. He admitted it and told me he had been in love with me for years (I’ve known him since I was 10) and then broke down crying: he showed me the videos on his phone and then deleted them in front of me - I didn’t ask him to and wanted him to keep the evidence. I’ve made a police report and I’m waiting for them contacting me back.