During British rule in India, Who played the most significant role in making English language as medium of instruction?

Himachal Pradesh Staff Selection Commission (HPSSC) released the schedule of screening test to be conducted for selection to the posts of Supervisor LDR Post Code-561. Screening test was held on 28.05.2017 in evening session (from 02.00 PM to 04.00 PM). This is for ICDS department post.