Claud Butler restoration/build, my first bike!

Hello! I’m new to bikes and would like to show you guys an old Claud Butler bike I bought and repaired. I think the bike is from the 70s-80s. Not too sure on the year of the exact model. I thought maybe a Brevet.

I’m also really struggling to identify whether the frame is Reynolds 531 like the forks or not.

My dad told me, 531 is the best, get a 531 bike! So I thought I did until he showed me the sticker on the frame was missing. Is it surprising the forks are but not the frame ?

Would love to have your general feedback on the build with maybe suggestions. And I hope you like it !