What was the two-fold motive behind the systematic deindustrialisation effected by the British in pre-independent India?

Before the arrival of British, India was very famous for its handicraft industry all over the world. During the colonial period, the British followed the policy of de-industrialisation and it declined the handicraft industry of India. The main motive behind this de-industrialisation was -

•To make India the raw material market for British Industries as they could get it from here at cheap rates.

•To make India the market for British industries and to sell the products manufactured in Britain in Indian market at high prices.

In this way the British exploited India and it was double exploitation