(i) The city of London was a powerful magnet for migrant populations. It was a city of clerks,shopkeepers, skilled and semi-skilled artisans, soldiers, servants and beggars. It was the city of classes as well as masses. (ii) Apart from London dockyards, five major types of industries employed large number of workers. These industries included clothing, printing, footwear, metal and engineering. (iii) During the First World War London began manufacturing motor cars and electrical goods and number of large factories multiplied.