I don't think British India can be described as a Golden Age, when it was arguably the biggest transfer of wealth in history. When the British started colonizing India, its share of the World GDP was approximately between 1/5 and 1/4. So it was a major player. When they left, GDP share was a mere 4/100. Under British rule, India experienced massive de-industrialization. For example, the UK disassembled most of the handloom industry.