Hello Aspirant,
For admission into London School of Economics students have to appear for an entrance exam on the basis of which the college take admissions. If you want to take direct admission after your school, LSE will consider applicants offering the Higher Secondary School Certificate from the CBSE or ISC exam boards, with 95% in each subject taken for programmes requiring A-level grades of A*AA/AAA, and 90% in each subject taken for those requiring AAB. You can sit for GRE/GMAT if LSE asks for.
If you want to get transferred from the first year of college to LSE, you need to have good marks in first year and then apply for the college submitting required documents.
All the best!
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