Edited sentence: "  The standardisation of a dialect normally takes place in four individual stages: selection, acceptance, elaboration and codification.An analogous process has taken place in all regions where English has been codified into a form that is recognised as a standard.As England began to develop into a more unified political and economical entity in the later period of the Middle Ages, the centre of administration and commerce began to concentrate more on London.As a result the vocabulary of Standard English was also expanded.As a result, the London dialect became the one which was favoured by the educated and powerful.As the new standard began to spread into the domains of administration, government and the Church, it became necessary to expand the linguistic means by which this was to be carried out.At the end of the 15th century the London dialect had established itself as the dominant one and existed in two versions: a spoken one and a written one.Hughes and Trudgill state that Standard English is "[t]he dialect of educated people throughout the British Isles.It is the sociolect normally used in writing, for teaching in universities and schools, and on radio and television.Its employment by the court, as well as its political usefulness in the wake of growing a national consciousness, led to its final adoption as the standard.Of the early dictionaries probably the best known is that of Samuel Johnson, whose two volume A Dictionary of the English Language was published in 1755 and stands at the beginning of a long tradition of dictionaries.Power lies at the core of the standardisation of a dialect, and those groups of society which have the greatest influence are most likely to define the standards by which the dialect is spoken.The acceptance of the London dialect as the standard, however, is not so much a result of the economic influence of the London merchants, but that of the students who came from all over England to study in Oxford and Cambridge and here adapted the fashionable dialect.The following is an example of the four stages in British Standard English.The latter was called Chancery Standard and developed quickly into the dialect which was to become Standard English.The variety of Standard English became increasingly complex and as more people aspired to use this particular variety, there emerged an enormous need to know of what it consisted.This helped the variety to a great social and geographical mobility.This process was aided by the novelty of printing, introduced to England by William Caxton in 1476