Explain De-urbanisation phenomenon during British rule

“In the late eighteenth century, Calcutta, Bombay and Madras rose in importance as Presidency cities. They became the centres of British power in the different regions of India. At the same time, a host of smaller cities declined. Many towns manufacturing specialised goods declined due to a drop in the demand for what they produced. Old trading centres and ports could not survive when the flow of trade moved to new centres. Similarly, earlier centres of regional power collapsed when local rulers were defeated by the British and new centres of administration emerged. This process is often described as de-urbanisation. Cities such as Machlipatnam, Surat and Seringapatam were de-urbanised during the nineteenth century. By the early twentieth century, only 11 per cent of Indians were living in cities.”