Mechanics at GCSE or AS/A-Level? I had to do Statistics, Mechanics and Pure Mathematics in my A-Levels but I think they might have changed them the year after I did mine.
I had "core" modules so did Core 1, Core 2, Decision 1 for AS, and then Core 3, Core 4, and I guess Decision 2 ( Who knows. Can't remember) for A2. Only subject I took because I'd been good at GCSE and not because I wanted to. *Sigh* Hated every second of it. But I got it all out the way a year early which gave me room for an extra subject so there was an upside.
All entirely pointless of course because I needed a C in Music and an E in any other subject to get into RCM.