`Glasgow university structure

Hey all

I'm looking at applying for an honours degree in science at Glasgow, and I'm getting pretty confused by the way the flexible degree structure works. From what I can see you study three subjects in first year, normally from your chosen subject area but potentially (?) from other areas like arts or social sciences.

The courses I'm looking at are Physics with Astrophysics or Astronomy. This is all great but the problem is your three subjects seem to have to be astronomy, physics and maths, essentially meaning the flexible degree isn't so flexible after all. I'm not sure if this is true or not so if anyone could help explain it would help me a lot- what I really want is to do either of these degrees with an arts/social science component before I specialise down to astronomy, and I don't know if that is possible or not.

Thanks!