When was a single state created in England?

A single state in England was created in 927. Then thelstan ascended the throne. True, already in 1066 the English lands were captured by the Normans. Thus, England became Norman. At the same time, the power of the Anglo-Saxons (who ruled before that on the lands of England) was suppressed. So from that time a new period of history began in England. Soon after, the Kingdom of England was able to become one of the most influential in western Europe.