Most people in the UK dislike the monarchy ..the royal family hasn't been worshipped in like a few hundred years when parliament took over and declared them non authrority
This.
You'd normally find weepy single mums, homosexuals and unfortunate news paper journalists fawning over that unwanted tragedy that was the coverage of The Royal Wedding but the common stock of UK persons going about their daily couldn't give a ripe, red, fukk about it, man, same for the rest of the royal family.
As for Root beer. I don't drink it so when I'm in the UK I don't look for it, but there are tons of novelty shops that sell imported shyte so I'm sure you can find it somewhere. I've seen cans of Barqs or whatever the fukk it's called on corner shop shelves.