Not in The United Kingdom Of Great Britain and Northern Ireland they're not!
I do hope you realize that English language has been long ago bastardized by countless many others. Indian English, North American English, Australian English, and then some more has their own peculiarities, so ultimately the only thing they share is the origin.
Couple this with the fact that English has by far the most loanwords of any language which doesn't does its grammar rules any good; having exceptions for exceptions to the rules.
Finally, some people would raise eyebrows if they learned that we hold spelling bees. I understand that the word for 'to spell' in Italian is not known by many Italians because they have not had any need to learn how to spell Italian words as it can be spelled as it is pronounced. This is not so true for English.
To claim there is a kind of one true English and everyone must adhere to it is folly. The only way to have one true dialect is when it's dead. See: Latin.