Question

give two reasons why the population of London expanded from the middle of 19th century

Answer 1

(I) London was a powerful source of attraction for migrant population, even though it did not have large factories.
(II) The 19th Century London was a city of clerks and shopkeepers of small traders and skilled artisans.
(III) During First World War, the number of large factories increased and a large number of people joined the newly established jobs.