Only a small percentage of the population of London speaks with the cockney accent--those people who live in the East End, in Dockland, in the area just to the east of the Tower of London. And the population of London is only a part of the population of England as a whole.
Dandy Dan speaks with a Cockney accent in the movie "Bugsy Malone."
Everyone who speaks has an accent.
Amy grew up in Southgate, which is in north London. People who aren't familiar with accents around this area would probably describe her accent as an Estuary accent or even Cockney. However, I would describe her accent as North London. For people who dont live in or near London, the differences between London, Essex, Estuary and Cockney accents can be virtually impossible to tell, as they are often subtle. Although some people speak like Amy Winehouse in north London (including me :D ), note that there is a large range of accents in London, ranging from what is often known as 'Jafaican' to Cockney. Many, but by no means all, people from where Amy was from speak with an accent like hers. Hope that answers your question!
Maine does have a distinctive accent, sometimes called a "Down East" accent, but not everyone in Maine speaks with a thick accent. The accent can vary depending on the region within the state.
It is difficult to provide an exact percentage, as accents can vary widely and are subjective. However, it is safe to say that the vast majority of English speakers worldwide speak with some form of accent, as accents are a natural part of language diversity and variation.
Joseph Morgan speaks with an English accent
British is not a language. Tom Felton is from England. He IS British. He speaks in English. Perhaps you mean does he really have a British accent, which he does.
She speaks nagoya accent.
I think it's French.
Name a state where they don't. Everyone on Earth speaks with some kind of accent.
She had a charming French accent that made her speech sound elegant and sophisticated.
Because everyone speaks with an accent, including you. Accent is simply the way we shape our mouth as we say words, and everyone shapes it one way or another, and everyone sounds different to someone who speaks a different way. but to Americans yes it does sound like an accent.