Anyway, in 1918, he published an outline of English phonetics in which he described received pronunciation, and he based the accent on the public school pronunciation.
Leave friends, peers, or teacher's voice notes in English, or record yourself speaking and listen back to them, to see where there are areas you could improve.
Because if you listen to an audio guide in English, as you're walking around the museum, I bet you are going to learn a ton of new vocabulary, some great expressions for describing what you're seeing.