William the Conqueror’s “Domesday Book”, for example, would have been pronounced “doomsday”, as indeed it is often erroneously spelled today. After the Great Vowel Shift, the pronunciations of these and similar words would have been much more like they are spoken today. The Shift comprises a series of connected changes, with changes in one vowel pushing another to change in order to "keep its distance", although there is some dispute as to the order of these movements. The changes also proceeded at different times and speeds in different parts of the country.