During the Middle Ages, was there a substantial migration of Dutch-speaking refugees towards Britain?

Answer 1

For example, many Dutch and Flemish moved to southern and eastern England in the 14-15-16th century helping the country develop from a mostly agrarian to a manufacturing economy. These manufacturing activities revolved around cloth production, beer brewing, and brick making. The Flemish and Dutch migrants also helped build Hanseatic trading relations with trading companies based in Flanders and the Netherlands.