Firstly, there were anthropomorphised felines on Broadway in 1957 in "Shinbone Alley". Mel Brooks co-wrote the book so I suppose ALW will finally start acknowledging his contribution to "Cats"?
Secondly, the "Phantom" theme was totally absolutely ripped off from Pink Floyd's "Echoes" and there is no way that ALW being a rock-conscious British guy in his twenties would not have heard that album when it came out in 1971. Roger Waters could totally have sued and won but he doesn't need the money and it wouldn't hurt ALW's bottom line in the slightest, so he went all Tito Puente in "The SImpsons" and wrote an insulting song about him, from his "Amused To Death" album:
"We cower in our shelters, with our hands over our ears
Lloyd Webber's awful stuff runs for years and years and years
An earthquake hits the theatre, but the operetta lingers
Then the piano lid comes down and breaks his f***ing fingers
It's a miracle"