If you want to do astronomy, you have to do physics.
Maths will be preferred at uni too, but not required. However, I think you will need maths because i did physics at alevel and you do a lot of maths, especially in the astronomy topic. The few people in my class who didn’t do maths really struggled because they couldn’t get their heads around the maths that were involved in the calculations
You don’t need psychology or criminology for astronomy. My third a level was psychology (the other two were maths & physics ofcourse). I had picked psychology because I was told it was ‘easy’, but it really isn’t that easy. The content itself in psychology is easy, but remembering EVERYTHING is soo hard. There is sooo much to remember, from case studies to names to procedures to results etc.
I don’t know anything about criminology.