New England English
Eastern New England English encompasses Boston and Maine accents, and, according to some sources, the distinct Rhode Island accent. All Eastern New England English is famous for non-rhoticity, meaning it drops the "r" sound everywhere except before a vowel: thus, in words like "car", "card", "fear", and "chowder" (). The phrase "Park the car in Harvard Yard"—dialectally transcribed —is commonly used as a shibboleth, or speech indicator, for the non-rhotic Eastern New England dialect running from Boston north to Maine, and as far west as Worcester, which contrasts with the generally rhotic dialects elsewhere in North America. In all of Eastern New England, except Rhode Island, words like "caught" and "cot" are pronounced identically (both are often rounded, thus: ), because those two vowel sounds have fully merged. A phenomenon called Canadian raising occurs throughout Eastern New England, causing "writer" to have a different stressed vowel sound than "rider", and for the verb "house" to have a different vowel sound than the noun "house". and have relatively back starting positions. The "horse"–"hoarse" distinction is still present to some extent in some areas, as well as the "Mary"–"marry"–"merry" distinction in many speakers.
Received Pronunciation
Like all accents, RP has changed with time. For example, sound recordings and films from the first half of the 20th century demonstrate that it was usual for speakers of RP to pronounce the sound, as in "land", with a vowel close to , so that "land" would sound similar to a present-day pronunciation of "lend". RP is sometimes known as the Queen's English, but recordings show that even Queen Elizabeth II has changed her pronunciation over the past 50 years, no longer using an -like vowel in words like "land". 
Some changes in RP during the 20th century include:The change in RP may be observed in the home of "BBC English". The BBC accent of the 1950s is distinctly different from today's: a news report from the 1950s is recognisable as such, and a mock-1950s BBC voice is used for comic effect in programmes wishing to satirise 1950s social attitudes such as the Harry Enfield Show and its "Mr. Cholmondley-Warner" sketches.