@Piggywaspushed as an English teacher you will have the most relevant perspective on this, but it seems to me that the only bit the govt can be blamed for is narrowing the GCSE curriculum, if that has put students off English A level. My DC were very keen to give up English, so I don't know so much about it, but my perspective is that the reason A level English is becoming less popular is because sixth forms are generally offering more subjects , so availability of Media Studies, Film Studies, Lang & Lit, Law, Politics all be impacting the popularity of English, and Psychology has come from nowhere to be 5th most popular.
Although Gavin Williamson is a prize idiot, I don't think the Tories are anti traditional degrees like English. I just checked his wikipedia and he has a BSc in Social Sciences from Bradford.
Anybody doing a new thread? Only 12 left in this one.