What type of writing system did England use in the middle ages?

Old English and Anglo-Saxon was often written with a version of the Runic alphabet, which brought to Britain by the Anglo-Saxons until about the time of William the Conqueror in the 11th century, who brought the Latin alphabet and the French language to England. When the French language combined with Anglo-Saxon in England, Middle English developed, which used a version of the Latin alphabet. This would eventually give way to what we speak today, known as Modern English, which developed circa 1470.