Immigrants began when the Normans arrived in 1066 . London has been made the new home for Germans , French , Spanish , Italians and dont forget the Jewish since that date . I think you are referring to colonial immigration from India , Pakistan and Jamaica . All contributing to making London what it is today that began in the sixties when the UK needed workers iin the sixties . Oh yes , do not forget the Irish contribution as they say London was built by Irish labour .